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Did you know?

After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

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Atropine was named after the Greek goddess Atropos, the oldest and ugliest of the three sisters known as the Fates, who controlled the destiny of men.

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Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.

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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

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The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

The Laocoön Group, Roman copy, perhaps after Agesander, Athenodorus, and Polydorus of Rhodes. The Laocoön Group, Roman copy, perhaps after Agesander, Athenodorus, and Polydorus of Rhodes.
Photo of a sign taken at an emissions test facility. Photo of a sign taken at an emissions test facility.
Flow Patterns and Large-Scale Weather: The Steering of Midlatitude Cyclones Flow Patterns and Large-Scale Weather: The Steering of Midlatitude Cyclones
Saffir-Simpson Scale (Hurricane Intensity Scale) Saffir-Simpson Scale (Hurricane Intensity Scale)
Consider the following hypothesis problem. n = 30 H0: 2 = 500 s2 = 625 Ha: 2 500 The test ... Consider the following hypothesis problem. n = 30 H0: 2 = 500 s2 = 625 Ha: 2 500 The test ...
Soybean plants in nitrogen-poor soil show how root nodules affect growth. Only the darker green plan Soybean plants in nitrogen-poor soil show how root nodules affect growth. Only the darker green plan
Video: How to find out if a population is evolving?

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