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Blood type is dictated by genes that determine which kinds of molecules, called oligosaccharides, are found on the surface of your red blood cells. Norovirus and a few other viruses use these oligosaccharides to grab onto and infect intestinal cells

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Two algal species share important genes with all modern land

Count your neurons when you count your blessings

Plants and animals came back much faster than thought, with plants spurring mammals to diversify, the team reports today in Science.

For nearly a decade, researchers have puzzled over what the Denisovans looked like. Now, we have our best model yet of the species' skeleton.

Modern humans and more ancient hominins interbred many times throughout Eurasia and Africa, and the genetic flow went both ways.

We cannot be certain, despite what many have contended, that the Universe began from a singularity. We can, however, break the illustration you see into the different eras based on properties the Universe had at those particular times.

Theories about how animals became multicellular are shifting as researchers find greater complexity in our single-celled ancestors.