30 going on 21: Bryan Johnson’s girlfriend reveals extreme biohacking that made her skin age backwards

Kate Tolo, the girlfriend of biohacker Bryan Johnson, has revealed her skin is nine years younger than she is — but, she ...

Here’s how we find out how strong tornadoes were

Around 1,200 tornadoes occur on average in the United States each year and every one of them gets its own rating on the Enhanced Fujita Scale.