« previous next »
« previous next »
 

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Did you know?

Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.

Did you know?

Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

Where mangrove diversity is high, mangrove species show clear patterns of vertical zonation relative Where mangrove diversity is high, mangrove species show clear patterns of vertical zonation relative
(a) With few ticks, moose retain a brown coat; (b) at high numbers of ticks, moose self-groom, destr (a) With few ticks, moose retain a brown coat; (b) at high numbers of ticks, moose self-groom, destr
Modern primate study sometimes involves high-tech methods. This golden lion tamarin is having a batt Modern primate study sometimes involves high-tech methods. This golden lion tamarin is having a batt
Ten Leading Causes of Death in High-Income Countries, 2008 Ten Leading Causes of Death in High-Income Countries, 2008
Hot spots highlight areas of high biodiversity Hot spots highlight areas of high biodiversity
High school science classes are required to use deductive logic High school science classes are required to use deductive logic
Video: Pasteur's Experiment

For a complete list of videos, visit our video library