A week after OpenAI made headlines with an A.I.-generated proof, a new “declaration” by 16 experts raises concerns that the technology threatens math as a discipline.

A newly identified prehistoric crocodile relative, Eosphorosuchus lacrimosa, was discovered alongside another croc species in New Mexico fossils dating back 210 million years. Around 210 million years ago, two crocodile relatives about the size of modern jackals stood together along a humid riverbank in what is now northern New Mexico. One of them, Hesperosuchus agilis, [...]

The Bundibugyo virus, a little known type, previously had caused just two small outbreaks. Now it’s at the center of a rapidly widening epidemic in Africa.