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Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

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Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

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The average office desk has 400 times more bacteria on it than a toilet.

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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

Part of the Hubble Ultra-Deep Field image showing a typical section of space containing galaxies int Part of the Hubble Ultra-Deep Field image showing a typical section of space containing galaxies int
The Sun in false-color ultraviolet image The Sun in false-color ultraviolet image
practice image - mink anatomy lab - head and neck practice image - mink anatomy lab - head and neck
The research methods that sociologists choose depend partially on the questions they want to answer. ... The research methods that sociologists choose depend partially on the questions they want to answer. ...
For each substrate below, choose which reaction type is favored. Place the letter of the ... For each substrate below, choose which reaction type is favored. Place the letter of the ...
Cell division image Cell division image
Video: Photosynthesis overview Animation

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