Will a man-made meteor shower open the Tokyo Olympics?

Abandoned pup becomes team's bat dog

Skateboarders shred Dubai's waterpark

Tim Peake completes the London Marathon from space

Why Ping-Pong is good for your brain

New blood test detects concussion up to a week after injury

How to run a beer mile

Gymnast with 1 leg defies the odds

Mom of 4 smashes treadmill-running record

Soccer great Brandi Chastain agrees to donate her brain to concussion research

Why are girls more susceptible to concussions than boys?