Please contact Steven Lewis to suggest new resources or report broken links.
TABLE OF CONTENTS:
Search Engines
Health Care Associations
Science & Medical News
Health & Medical Reference
Science Methods
Metrics & Measurement
Chemical Foundations
Biological Molecules
Microscope
Cells
Histology
Human Biology Resources
Anatomy Model Photos, Quizzes
Physiology & Homeostasis
Terminology & Classification
Nervous System
Endocrine System
Skeletal System
Integumentary System
Muscular System
Cardiovascular System
Microbiology & Defense
Respiratory System
Digestion & Nutrition
Urinary System
Reproductive Systems
Dissections
Nystrom Torso Video Tour (10 minutes)
Video guides to: Occupational Therapy Assistants ||| Physical Therapy Assistants ||| Surgical Technologists ||| Dental Assistants ||| Radiologic Technologists ||| Paramedics and EMTs
 Search   for  
 Google   
National Library of Medicine (PubMed) (search professional medical literature)
Medical Dictionaries: MedicineNet ||| Stedman's / Dorland's ||| Free Medical Dictionary ||| Etymology

HEALTH CARE ASSOCIATIONS:


SCIENCE AND MEDICAL NEWS:
  • National Library of Medicine
  • Health News Review
  • Eureka Alert (AAAS)
  • Science Daily
  • Science News
  • SciTech Daily
  • World Science
  • AAAS News
  • News from PhysOrg
  • Medical News Today
  • Medicinet Health News
  • World Health News
  • MedPage Today
  • CNN Health News
  • Google Health News
  • USA Today Health News
  • Medical News Today
  • The Scientist
  • New York Times
  • Brain News
  • Drug Alert

    1. HEALTH AND MEDICAL REFERENCE:
    2. Best Doctors in Kansas City 2018
    3. Kansas City Doctors (find a physician)
    4. Board of Healing Arts: Kansas and Missouri
    5. Leading Causes of Death United States and worldwide.
    6. Leading Causes of Death United States 1900-1998 (CDC PDF)
    7. U.S. Preventive Task Force Recommendations
    8. Cochrane Medical Reviews
    9. World Health Organization (health education and statistics)
    10. Food and Drug Administration (FDA) (food and drug safety)
    11. Atlas of First Aid: A Case Study Approach
    12. Lab Tests Online (understand medical lab tests)
    13. Medline Plus (health information in 40 languages)
    14. Health Library (University of Maryland)
    15. Pathology Laboratory (University of Utah)
    16. Number Needed to Treat for Benefit or Harm
    17. New Health Advisor
    18. Medscape Health Resource Center
    19. Pathway Medicine (online textbook)
    20. American Council on Science and Health
    21. National Center for Complementary and Alternative Medicine
    22. Drugs, Vitamins, Herbs: The Scientific Evidence (Medline)
    23. eMedExpert (Information on Prescription Drugs)
    24. Physicians Desk Reference (PDR) for Rx and OTC Drugs
    25. Drug Safety Data Sheets
    26. Drugwatch (news on drug development and safety)
    27. Centers for Disease Control and Prevention (U.S. Government)
    28. National Cancer Institute
    29. WebMD (investigate symptoms, treatments, find a doctor)
    30. Medical History of U.S. Presidents
    31. Phisick -- A review of Ancient Medicine
    32. Journal of Medical Humanities
    33. Health and Medicine Streaming Videos
    34. Blausen Pathology Videos
    35. Mutter Museum of Medical Pathology (video)
    36. Free online life science courses
    37. Vendors of Biology Supplies and Anatomic Models
    38. SCIENCE METHODS

    39. Evolution of Clinical Research
    40. Medical Study Design
    41. Study Design 101


    42. The Mysterious Placebo
    43. Spontaneous Remission and the Placebo Effect
    44. Richard Feynman on Cargo Cult Science. (PDF)
    45. Distinguishing Science from Pseudoscience
    46. Why Bogus Therapies Often Seem to Work
    47. Science-Based Medicine and Neurologica
    48. Skeptical Medicine
    49. Quackwatch (guide to health fraud)
    50. The Medical Skeptic
    51. Fair Tests of Medical Therapies
    52. Discovery, Chance and Scientific Methods.
    53. Bad Science
    54. Experiment Design
    55. How to Understand Scientific Studies
    56. On Being Sane in Insane Places
    57. Korzybski's General Semantics (Steven Lewis)
    58. Seven Warning Signs of Bogus Science
    59. The Science of Religion
    60. Galileo's recantation (1633)
    61. Test Your Scientific Literacy
    62. Science Heroes
    63. METRICS AND MEASUREMENTS

    64. Coping with Math Anxiety
    65. Significant Digits (includes quiz)
    66. Significant Figures in Measurements and Calculations.
    67. Scientific Notation & Significant Figures
    68. Significant figures, Scientific Notation, Solving Equations
    69. Variability in Measurements
    70. Metric-English conversions
    71. Unit Conversions
    72. More Metric conversion problems and solutions
    73. Metric Conversion Tables UK
    74. The U.S. and the Metric System (PDF)
    75. How to Read a Triple-Beam Balance
    76. Reading a Triple Beam Balance and Quiz
    77. Common Lab Equipment
    78. Lifestyle Tools and Calculators
    79. Countdown Timer, Calendar Generator and Calculators
    80. CHEMICAL FOUNDATIONS OF BIOLOGY

    81. Chemistry 101
    82. Chemistry Guide
    83. Chemistry A to Z (NIH)
    84. History of Chemistry
    85. Virtual Chemistry (Elmhurst)
    86. Chemistry Tutorial (Australia)
    87. Video Lectures on General Chemistry (MIT)
    88. Molecular Structures (Purdue)
    89. Atoms and Molecules
    90. Chemical Elements Periodic Table
    91. Webelements Periodic Table
    92. Clickable Periodic Table of the Elements
    93. Elements of the Human Body
    94. The discovery of electrons
    95. Evolution of the atomic theory.
    96. Radioactivity
    97. Marie Curie, French physicist and Nobel laureate.
    98. Radiocarbon dating and the Shroud of Turin.
    99. Periodic Table of the Isotopes
    100. Stoichiometry: calculations involving balanced chemical equations.
    101. Temperature and Thermometers
    102. The Second Law of Thermodynamics
    103. Metabolism
    104. BIOLOGICAL MOLECULES

    105. Proteins, Carbohydrates, Lipids, Nucleic Acids, Vitamins, Water
    106. Organic Chemistry
    107. Biochemistry text
    108. Medical Biochemistry (many articles)
    109. Ban DHMO!
    110. Water Science
    111. Water
    112. Sticky Water.
    113. A Biography of Water
    114. Water Structure and Science
    115. Peptides and Proteins
    116. Proteins and Enzymes
    117. Ask a dietician about protein
    118. Enzymes (Wikipedia)
    119. Enzymes and animation
    120. Enzyme tutorial with animations
    121. Enzyme Inhibition (animation)
    122. Medical Biochemistry Page
    123. NAS 2005 Report on Dietary Reference Intakes
    124. Galactosemia
    125. DNA and RNA
    126. Discovery of DNA
    127. DNA from the beginning (animations)
    128. Deciphering the Genetic Code
    129. Origin of the chemicals of life

      MICROSCOPE

    130. The Parts of a Microscope
    131. Light Microscope Tutorial (animation with audio from NASA)
    132. Structure and Function of the Optical Microscope Wikipedia
    133. Principles of Light Microscopy (6-minute WMV by Steven Lewis)
    134. Nikon Alphaphot-2 Microscope (15-minute video)
    135. How to Use a Compound Light Microscope (15-minute Flash video)
    136. The Virtual Compound Light Microscope (practice your skills)
    137. Robert Hooke and Anton Leeuwenhoek
    138. History of the light microscope
    139. Microscopes and relative size in biology.
    140. Cell Biology and Microscopy

    141. CELLS

    142. Inside the Cell (NIH)
    143. The cell theory.
    144. Cell anatomy.
    145. Tour of the Animal Cell Model (10-minute WMV by Steven Lewis)
    146. Biochemical and Cell Animations
    147. Basic Cell Structures
    148. McGraw-Hill Cell Animations (Shockwave)
    149. Cell Biology Animations
    150. Cell Types
    151. Cell Organelles (Wikipedia)
    152. Membranes, Diffusion and Osmosis
    153. Cell Cycle and Cell Division (6-minute Flash video)
    154. Mitosis images. (Britannica)
    155. Cell Cycle and Mitosis Tutorial


    156. Cells Alive
    157. ATP
    158. Molecular Genetics (Palomar)
    159. Watson and Crick's 1953 paper on DNA.
    160. The New Genetics (NIH)
    161. Learn Genetics (Utah University)
    162. Universality of the genetic code.
    163. Stem Cells
    164. Cellular basis of cancer.
    165. Cancer.
    166. HISTOLOGY

    167. Atlas of Microscopic Anatomy
    168. Virtual Microscopy(many images)
    169. Histology Tutorial (28-minute Windows Video)
    170. HistoWeb (JayDoc)


    171. Histology World
    172. Histology Zoomer
    173. Histology Images
    174. Histology Slides (Illinois U.)
    175. Histology at Yale
    176. Histology of the Skin (10-minute video)
    177. Body Mass Index (BMI) Calculator and Body Fat Measurement
    178. Body Fat Measurement (Skinfold Caliper Method)
    179. Underwater Weighing Video and Sample Calculation of Body Fat Composition
    180. GENERAL HUMAN BIOLOGY RESOURCES

    181. Imaging the Body
    182. Textbook of Regional Anatomy (Dartmouth)
    183. OpenStax Anatomy-Physiology Textbook
    184. Wiley Anatomy Drill and Practice
    185. Regional Human Anatomy Textbook (Dartmouth)
    186. Teach Me Anatomy
    187. Human Anatomy for the Artist
    188. Get Body Smart (anatomy tutorials and quizzes)
    189. Innerbody Interactive Human Anatomy (interactive quizzes by system)
    190. Webanatomy (many quizzes)
    191. A&P Practical Exams
    192. Anatomy-Physiology tutorials (Chute)
    193. Anatomy Box
    194. Anatomy at SUNY
    195. The Virtual Human Body (animated tour in Spanish and English)
    196. A&P Study Guides
    197. Human Anatomy (cadaver dissections and quizzes)
    198. Maricopa's Anatomy-Physiology Tutorial (many quizzes)
    199. Illustrated Encyclopedia of Anatomic Variations (real vs. textbook people)
    200. Radiology A to Z
    201. Human Body Images, Radiographs (Stanford)
    202. Anatomy Atlases, Textbooks and Digital Libraries
    203. Atlas of Gross Anatomy (anatomy images)
    204. Anatomy Tables by System and Region
    205. Gray's Anatomy (1918 edition full text, illustrated, searchable)
    206. Instant Anatomy (mostly colorful, labeled drawings with learning tips)
    207. Biological Anthropology (human evolution and taxonomy)
    208. Human Cadaver Dissection Videos
    209. ORlive Surgical Videos
    210. Pearson Anatomy Tutorial (many quizzes)
    211. Anatomy & Physiology Tutorial Links
    212. Speech Anatomy & Physiology
    213. Wisconsin's Anatomy-Physiology (text with labeled drawings)
    214. Anatomy Lab Simulator (labeled photos & drawings of organs)
    215. Useless Body Parts (no need for donors)
    216. WebMD Calculators, Health Quizzes, Anatomy Tools
    217. WebMD Symptom Checker (be your own doctor, then sue yourself)
    218. BBC's Interactive Body (anatomy games)
    219. Maricopa's Biology Text
    220. Kimball's Online Biology Text
    221. Normal Lab Values
    222. How Stuff Works Anatomy Channel (animations and videos)
    223. Five Largest Organs in in the Human Body
    224. Explore Your Inner Animal (HHMI)
    225. Biology of Aging (forever young?)
    226. Photobiology
    227. ANATOMY MODEL PHOTOS, QUIZZES AND KEYS:

    228. Anatomy Model Quizzes
    229. Keys to Anatomic Models (Austin CC)
    230. Motlow State CC Model Keys: Part 1, Part 2, Part 3 (PDF)
    231. Photos of Anatomic Models (Merced College)
    232. Anatomic Model Photos (no labels)
    233. Anatomy Tutorials from Maricopa (model photos with keys)
    234. Bioweb Anatomy Quiz (Wisconsin)
    235. Anatomy Models w Labels (San Diego Mesa College)
    236. Anatomy Models w Labels (Santa Rosa)
    237. Visual Atlas Body Systems (BBC)
    238. Photo Gallery of Anatomic Models (cursor over numbers for labels)
    239. Palomar Anatomic Model Index and Quiz
    240. Models Images and Keys (Palomar)
    241. Model Images (Baker)
    242. Middle Tennessee State University
    243. Anatomic Model Keys (no photos) (Tidewater)
    244. Cerritos Anatomy Model Quiz (click on green dots for labels
    245. Voyager Models and Slides
    246. Bluegrass Anatomy Model Quiz
    247. Anatomy Model Quiz (click links below images for labels)
    248. Niagara Virtual Anatomy Lab (labeled models)
    249. Pasadena CC's Virtual Anatomy Lab (click above photo for key)
    250. Anatomic Images Extremities w labels
    251. Anatomy Drill and Practice (Wiley)
    252. Anatomic Model Keys (NAPA Valley)
    253. HOMEOSTASIS / HUMAN PHYSIOLOGY

    254. Human Physiology textbook (Wikibooks)
    255. Prnciples of Physiology textbook
    256. Cells and the Human Body (textbook)
    257. Physiology Web
    258. A Framework for Human Physiology
    259. Homeostasis of Body Sugar (6-minute Flash video)
    260. Homeostasis
    261. Physiology Models
    262. Physiological Homeostasis
    263. Acid-Base Physiology
    264. Examples of Homeostasis
    265. Virtual Physiology Experiments
    266. TERMINOLOGY AND CLASSIFICATION

    267. A Brief History of the English Language by Steven Lewis
    268. Anatomic Terminology
    269. The Language of Anatomy
    270. Dictionary Search
    271. Basic Vocabulary of Gross Anatomy
    272. Anatomic Pronunciation Guide
    273. Etymology (origin) of Medical Terms
    274. Medical Eponyms
    275. Cornell Notetaking Method (YouTube video)
    276. Medical Flashcards, Word Searches and Games
    277. Classification of Living Things
    278. Taxonomy (Wikipedia)
    279. Review of Anatomic Regional Terminology (PDF)
    280. NERVOUS SYSTEM:

    281. Nervous System Models (labeled and unlabeled)
    282. Nervous System Models (labeled)
    283. Cerritos CNS Model Quiz
    284. Adventures in Neuroanatomy
    285. Textbook of Neuroscience (Dartmouth)
    286. Neurotransmission
    287. Neurotransmitter Net
    288. Interactive Neurologic Exams
    289. Reaction Speed Timer and Reaction Time Test
    290. Neurophysiology Virtual Lab (HHMI)

      EYE AND VISION

    291. Anatomy-Physiology of the Eye
    292. Webvision
    293. The Human Eye
    294. Somso Eye Video Tour (WMV, 14 minutes)
    295. Lutein and Zeaxanthin protect eyesight
    296. Vision Loss Simulations
    297. Zeiss Online Vision Screening
    298. Snellen Eye Chart and 20/20 Vision
    299. The Joy of Visual Perception
    300. Colorblind
    301. Color Vision and Tests for Color Blindness
    302. Color Afterimage Test (squares) and Dots and Flag

    303. EAR: HEARING AND BALANCE

    304. The Human Ear
    305. Virtual Tour of the Ear
    306. Anatomy of the Ear
    307. High-Frequency Hearing Test
    308. Audiology Resources and Hearing Test (YouTube)
    309. Dizziness, Imbalance and Hearing Disorders
    310. Vestibular Function
    311. Eustachian Tube Dysfunction
    312. BRAIN

    313. The Brain from Top to Bottom
    314. My Three Brains
    315. The Whole Brain Atlas
    316. The Brain from Top to Bottom
    317. Split-Brain Experiments
    318. Sheep brain dissection guide
    319. My brain's bigger than yours!
    320. Cranial Nerves with Puzzle
    321. Interactive Brain Atlas
    322. Cranial Nerves at Yale
    323. More Cranial Nerves
    324. Cranial Nerve Quiz
    325. Brain Chemistry of Depression
    326. Antidepressant Medications
    327. Circadian (daily) Rhythms and Suprachiasmatic Nuclei
    328. Prefrontal Lobotomies
    329. Brain Games (exercises to stimulate your brain)
    330. Reaction time test
    331. OTHER NERVOUS SYSTEM RESOURCES

    332. Glossary of Neuro-anatomy Terms
    333. Peripheral Nerves
    334. Head and Neck Anatomy Quiz
    335. Spinal Cord Injuries
    336. Neuroanatomy of Speech, Swallowing and Language
    337. Neurobiology
    338. Taste
    339. General Psychology
    340. Conditioned Reflexes by Ivan Pavlov (1927)
    341. Sleepless at Stanford
    342. Sleep and Learning (no snoozing in class!)
    343. Big 5 Personality Traits
    344. Intelligence and IQ
    345. Average IQ by Country
    346. ENDOCRINE SYSTEM (See General Resources for more links.)

    347. Chemical Messengers and the Endocrine System
    348. The Endocrine System
    349. Pituitary Disorders
    350. Textbook of Endocrinology
    351. Pathophysiology of the Endocrine System
    352. An Endocrine Webtext
    353. The Hormone Foundation
    354. Your Hormones
    355. Hormones and their Receptors
    356. Non-Traditional Endocrine Tissues and Hormones
    357. Vitamin D Hormone in Health and Disease (YouTube)
    358. Human Growth Hormone
    359. Glucocorticoids
    360. Ketosis versus Ketoacidosis

    361. SKELETAL SYSTEM (See General Resources for more links.)

    362. The 206 named bones of the Standard Reference Adult
    363. Bone Basics (Smithsonian)
    364. The Human Skeleton
    365. Bones of the Human Body (Wikipedia)
    366. Skeleton Quiz with photos
    367. All About Bones (labeled photos)
    368. Lumen Bone Box
    369. Webanatomy Skeleton Quiz
    370. Bones of the skull, vertebrae and extremities.
    371. Skull Slideshow and Quiz
    372. Maricopa Skull Quiz and Foramina
    373. Anatomy and Pathology of the Skull Base (flash animation)
    374. Bones around Somso Eye
    375. Comparative Skeletons Project
    376. Lessons from a Bone Box
    377. Bones and Joints
    378. Bone Tables
    379. Bones Don't Lie (Forensic Science)
    380. Joints (University of Arkansas)
    381. Joints in Motion
    382. The Cervical Spine
    383. Radiology
    384. Vitamin D in Health and Disease
    385. Vitamin D, Cod Liver Oil, Sunshine and Rickets
    386. INTEGUMENTARY SYSTEM

    387. Textbook of Dermatology
    388. Integumentary System images
    389. Dermatology A-Z
    390. The Skin Site
    391. Skin Conditions
    392. Skin Care Advice
    393. Biology of Skin Color (HHMI film)
    394. MUSCULAR SYSTEM (See General Resources for more links.)

    395. Get Body Smart Muscles (includes animations and quizzes)
    396. Muscles of the Upper and Lower Body (labeled images)
    397. Muscle Models with Labels
    398. Muscle Models Part 1 and Part 2
    399. Illustrated Muscles of the Human Body (alphabetical list with images)
    400. Musculo-Skeletal Anatomy (muscle tables with images)
    401. Muscle Tutorial (click on photo to view muscle name)
    402. Loyola University Illustrated Muscle List
    403. Innerbody Muscle Quiz (cursor over muscle to view label)
    404. Illustrated Muscle Tables
    405. Muscles Tables (no images)
    406. Muscles and Joints
    407. Muscles in Action (Quicktime movies)
    408. Muscle Contraction
    409. Muscle Physiology and Stretching
    410. Muscle Physiology and Structure
    411. Muscle Physiology (PDF)
    412. Motor Pathways (PDF)
    413. Muscles and Exercise
    414. Physiotherapy by Region and Injury
    415. CARDIOVASCULAR (See General Resources for more links.)

    416. WebAnatomy Cardiovascular (many quizzes)
    417. Atlas of Cardiac Anatomy
    418. The Heart Site
    419. Blood Histology Images
    420. Blood Cells
    421. Hemostasis Encyclopedia
    422. Circulatory Model
    423. Cardiovascular Physiology
    424. Cardiovascular Disorders
    425. Cardiovascular Pharmacology
    426. Texas Heart Institute Cardiovascular Tutorial
    427. Cardiac Cycle animation
    428. Heart Sounds and Cardiac Arrhythmias
    429. Cardiology Virtual Lab (HHMI)
    430. EKG Academy
    431. Electrocardiography (ECG) Quiz
    432. Table of Resting Heart Rates
    433. Circulatory Systems
    434. Wireman Circulatory Model
    435. Arteries and Veins (Arkansas U.)
    436. Vascular Web
    437. Arteries and Veins
    438. Fetal Circulation
    439. Blood Pressure Measurement (Youtube)
    440. Cardiovascular Physiology
    441. CardioBriefs Blog
    442. MICROBIOLOGY AND DEFENSE

    443. The Immune System
    444. Dr. Kaiser's Online Microbiology Text
    445. Medical Microbiology Text
    446. Vaccines and Immunizations (CDC)
    447. History of Vaccines
    448. Microbiology Information Portal
    449. Microbiology Lab Explorer
    450. Microbiology Diagnostic Procedures
    451. Medical Entomology
    452. Bad Bugs -- Foodborne Pathogens (free PDF text)
    453. Probiotics
    454. Flu Facts
    455. Defence Mechanisms and Leukocyte Function
    456. The Benefits of Hand Washing
    457. History of Vaccines
    458. The Immune Stimulatory Effects of Vitamin D
    459. United Nations Program on HIV / AIDS
    460. Immunology Virtual Lab (HHMI)
    461. Body Farm - Human Decomposition (10-minute video)
    462. RESPIRATORY (See General Resources for more links.)

    463. Lung Anatomy (Medscape)
    464. Cerritos Respiratory Model Quiz
    465. Johns Hopkins' Interactive Respiratory Physiology
    466. Ventilation-Perfusion Ratio (KU Med)
    467. Lung Function Fundamentals
    468. Vital Capacity Calculator
    469. Respiratory System
    470. Air Density and Pressure
    471. The Larynx
    472. Lung Diseases
    473. The health risks of cigarette smoking.
    474. DIGESTION AND NUTRITION

    475. Dietary Reference Intakes (USDA)
    476. Search the USDA Food Nutrient Database
    477. USDA Best Food Sources for Specific Nutrients
    478. FDA How to Read a Food Label
    479. Daily Values on Food Labels
    480. Your Digestive System (Adobe PDF)
    481. Dental Anatomy
    482. Oral Health Topics (ADA)
    483. Animated Teeth (Dental FYIs)
    484. Pathophysiology of the Digestive System
    485. The Vermiform Appendix
    486. Vestigiality of the Vermiform Appendix
    487. 26 Ways to Spot a Nutrition Quack
    488. Dietary Guidelines for Americans 2015-20 (PDF)
    489. Dietary Reference Intake Calculator
    490. Kitchen Calculator
    491. Measuring Body Fat Using Calipers
    492. Harvard School of Public Health Nutrition Source
    493. FDA Center for Food Safety and Applied Nutrition
    494. Ask a Dietician
    495. Weight Loss Resources
    496. Science of Cooking
    497. Linus Pauling Institute Nutrition Information Center
    498. Iowa State University Food Safety
    499. The World's Healthiest Foods
    500. Vegetarian Resource Group
    501. URINARY (See General Resources for more links.)

    502. How Your Kidneys Work
    503. Kidney and Urology Diseases and Urinalysis
    504. Urinalysis (mouse over)
    505. Urinalysis (Cornell)
    506. Urinalysis (Lab Tests Online)
    507. Urinalysis (American Family Physician)
    508. National Kidney Foundation Health Guide
    509. REPRODUCTION

    510. Healthy Pregnancy
    511. Lectures on Human Reproduction
    512. Hormones of the Reproductive System
    513. Reproductive Systems (54-minute Flash video)
    514. Museum of Menstruation and Women's Health
    515. Men's Health Topics
    516. History of Circumcision
    517. Human Development
    518. Multidimensional Human Embryo
    519. Embryology
    520. Video of Human Prenatal Development (PBS)
    521. Biology of Sex and Gender
    522. Methods of Birth Control
    523. History of Birth Control Methods
    524. Thirty four Symptoms of Menopause
    525. Gender Reassignment Surgery
    526. AIDS resources
    527. Sexual Health Resources
    528. The Prostate Gland
    529. DISSECTION

    530. Human Cadaver Dissection Videos
    531. The Virtual Human Project
    532. The Virtual Human Autopsy
    533. The Virtual Pig Dissection
    534. Cat Anatomy Tutorial
    535. Dissection 101 (PBS)

    This page was developed and is maintained by Steven Lewis.