Older chatbots, just like people, show signs of cognitive impairment, failing on several important metrics in a test normally used on human patients.

The Hubble Space Telescope revisits a star-forming region 5,000 light-years from Earth, which it first captured in 1997, revealing how the cosmic nursery has changed over human timescales.

A hot blob currently beneath the Appalachians may have peeled off from Greenland around 80 million years ago and moved to where it is today at a rate of 12…