By fishing shards of bacterial DNA from the teeth of bodies in a cemetery, researchers found the starting point for the plague that devastated Eurasia, they say.
Scientists have improved their ability to send quantum information across distant computers — and have taken another step toward the network of the future.
The first global analysis of its kind found that logging and farming are taking away reptile habitat at an unsustainable pace, exacerbating a worldwide decline in biodiversity.
More than half of species could face greater extinction risk by midcentury, a new study found, as rising heat and dryness test the prickly plants’ limits.