Animals

Claims that Przewalski’s horses were discovered in the U.S. are unverified. But the conservation story behind the last truly wild horse is worth your time.

A low-tech immune boost may help some species of frogs survive a brutal fungal disease that’s already ended 90 species

Mosquitoes carry a pair of hormones, one of which drives bloodlust while the other signals satiation, scientists say

Przewalski’s horses, once extinct in the wild, are revitalizing Kazakhstan’s “Golden Steppe”

It turns out there’s little good evidence that pets benefit our physical or mental health

Scientists finally know how a gelatinous deep-sea creature keeps its cells from paralysis under pressure

Spotted lanternflies are sometimes drawn to power line vibrations—and scientists are taking notice

Call off the pest control and learn to live with wildlife

One of Europe’s most common birds, the great tit, show an amazing adaptability to human-made habitats. There seem no limits for this species when it comes inventing new ways of acquiring food from people

Scientists observed leeches jumping like striking snakes, resolving long-standing debate

Gray whales in a small group that sticks close to the shores of the Pacific Northwest appear to be shrinking—and shockingly quickly

Sweltering heat in Greece, ozone-damaging chemicals on the decline and an investigation of what space does to our body are all in this week’s news roundup.