Kelsey Piper

Cages smaller than a sheet of paper are out. Perches and dust baths are in.

In the 1950s, more than 20 million children died each year. We’ve since cut that figure by two-thirds.

Billionaire do-gooders get a lot of flak. In his new book, Raj Kumar argues that they’ve helped change global health work for the better.

You can now buy a stake in vegan meat.

His tax returns show he donates 15 percent of his income. But is that how we should pick a president?

Plant-based meat products might fix our food system.

The new malaria vaccine isn’t perfect. It’s still a huge deal.

The UK is one of the few places in the world that bothers with pain treatment for farm animals. Now they’re running out.