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Small settlements and the scourge of slavery left gaps in Africa’s archaeological record. Yet sites and artifacts are revealing clues to the continent’s more recent history. An archaeologist explains the findings and threats to this heritage.
Can genetically modified animals help ease the shortage of organs? After years of research into xenotransplantation, the field is at a turning point — yet risks and ethical issues remain.
With the first medical therapy approved and systems like CRISPR-Cas showing up in complex cells, there’s a lot going on in the genome editing field. Here’s our primer.
Polygenic risk scores — a patient’s chance, based on tiny DNA variants, of developing cardiovascular disease, breast cancer and more — are coming to clinics. But there are kinks to iron out and accuracy remains an issue.
Scientists are finding that microscopic membranous bubbles called extracellular vesicles transmit messages from cells and do big jobs in many areas of biology — plus they might be useful for therapies.
Engineers aim to build machines that put people at ease. The effort reveals truths about ourselves.
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