Google is hosting an online science competition for students aged 13 to 18 years. You can read about it here. Google, along with the X PRIZE Foundation, has another ongoing competition called the Google Lunar X PRIZE. Twenty-five teams have signed up for it. These teams have until the end of 2015 to fly a robot and safely land it on our moon. The robot needs to travel 500 meters on the moon, and send data and videos back to us on Earth. The winner will receive US$30 million. You can follow the competition here.
Here is a video about the science competition.