Artificial intelligence is expensive to use, many companies discovered. That has led to a new era of saving costs.

The flaw, which Meta said it had fixed, allowed anyone to take over accounts using a bug in the company’s new artificial intelligence software.

The changes, after Meta’s legal losses in two child safety cases, are aimed at limiting harmful content shown to teenagers on Instagram, Facebook and Messenger.

Nature Geoscience, Published online: 01 June 2026; doi:10.1038/s41561-026-01986-3

Model analyses and projections of sediment heatwave duration, intensity and frequency across 41,499 representative lakes suggest that lake sediment heatwaves are more persistent and frequent than lake surface heatwaves and will intensify under global warming.