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Did you know?
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
![Invasive species in Canada include (a) zebra mussels, Dreissena polymorpha, (b) sea lamprey, Petromy](https://biology-forums.com/gallery/47/medium_33_19_02_12_5_47_42_20831726.jpeg)
![Invasive species in Canada include (a) zebra mussels, Dreissena polymorpha, (b) sea lamprey, Petromy](https://biology-forums.com/gallery/47/medium_33_19_02_12_5_47_42_20851112.jpeg)