After an asteroid struck at the end of the Cretaceous period, debris from wildfires filled the atmosphere and blocked sunlight across Earth, causing ecosystem collapse and extinctions.
Researchers have discovered specks of silver in 500 million-year-old fossilized worm dung; the precious metal likely came from "mining" microbes.
Ancient DNA reveals that woolly mammoths coexisted with humans in North America for 5,000 years longer than previously believed.
A new pre-print study claims to have quantum entangled a tardigrade with two superconductor qubits, though experts are skeptical.