Rider Adolf Silva is in critical condition after trying a double backflip off a ledge at a Red Bull event in Utah.

You throw enough people into a double backflip off a 20-foot-high pedestal — to someone else on another pedestal who catches the flyer by the arms — and it just starts to feel normal. Then you take a ...

Move over, Simone Biles – there's an insect with even better backflips. Globular springtails might only be a couple of millimeters long, but can jump and spin 60 times their own body height into the ...