Elon Musk is trying to launch his Starship mega-rocket again after the first attempt ended in an explosion. It's been 10 years in the making.

• Musk has hinted his Starship mega-rocket could try to reach space again 'soon.'
• In its first test flight, the world's most powerful rocket exploded mid-air. 
• Musk founded SpaceX in 2002 with the goal of using this kind of rocket to bring humans to Mars.

Elon Musk is known for his boundless ambition, which seems to defy every limit put in front of him — even exploding rockets.