A bluefin tuna swimming gracefully in the deep sea captured with artistic underwater photography.

Tuna Evolution Took 50 Million Years, Not One Asteroid Strike

The textbook version has tunas seizing the niche left by the K-Pg extinction. A new Yale phylogeny dates at least two of three endothermy origins to 10–15 million years after the impact, and the big body-size jump to 10.6 million years ago. The caveat: the branches are long enough that the traits could have appeared anywhere along them.

Soldiers unloading supplies from truck

A Year Into USAID’s Wreckage, the Public Wants a Chisel, Not an Axe

An Echelon/Rockefeller survey of 2,000 voters found eight in ten prefer fixing foreign aid to killing it — including the survey’s most skeptical Trump-aligned voters. What most opposition rested on, the data suggest, was a wild overestimate of the cost: people guess 20 percent; it’s one.