What if you had the power of invisibility, but it only works when you’re asleep? That might be useful for a surreptitious nap in public, but it still probably wouldn’t suit you as well as it does the ...

The frog Hypsiboas semilineatus is found in Brazil's Atlantic rainforest. This has been a fantastic week for frogs, and the scientists who love them. Subscribe to read this story ad-free Get unlimited ...