Fossils from northern Kenya point to a new human species that lived in Africa nearly 2 million years ago.
Fossils from northern Kenya point to a new human species that lived in Africa nearly 2 million years ago.
Lymphatic vessels grow towards two chemokines, revealing signals that could be important in cancer metastasis.
Ion beams carve slices in frozen cells, giving biologists an interior view.
At age 16, Alexandra Sourakov has her first scientific publication, on the foraging behavior of butterflies.
Japanese astronauts deliver an aquarium to the International Space Station to study the effects of microgravity on marine life.
Evolving the ability to run may also have made our ancestors smarter, suggesting that exercise can be healthy for the brain as well as the body.
Two whole genome duplications boosted the complexity of the ancestor of all vertebrates, but also introduced potential for disease.
Genomic analyses reveal that the polar bear evolved between 4 and 5 million years ago, far earlier than previous studies had estimated.
A relatively new pair of sex chromosomes in the fruit fly allows researchers to track their evolution from the beginning.
Researchers breed fruit flies that, after 40 generations of conditioning, have acquired the ability to react to numbers.