A 68-year-old woman from Guadeloupe has been identified as the sole person on Earth known to have a newly discovered blood type—one so rare that she is only compatible with herself. Scientists will ...

Earth formed about 4.6 billion years ago, during the geological eon known as the Hadean. The name "Hadean" comes from the ...

Pockets of microbes have been found living within a sealed fracture in 2-billion-year-old rock. The rock was excavated from ...