Ask unlimited questions for free
Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
Your heart beats over 36 million times a year.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
For a complete list of videos, visit our video library