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The proportion of asteroids we know about has grown rapidly in the past few decades, so what are the chances of us being taken by surprise? If we did spot an asteroid hurtling towards Earth, what could we do about it? And, perhaps most importantly of all, could the plot of the film Armageddon happen in real life? We get answers from Nasa’s Center for Near Earth Object Studies.

DJ Khaled is kind of a big deal on Snapchat. His messages reach millions of young people who find him both hilarious and inspirational. Whitney Henry takes a trip to his hometown in Miami to try to find out the key to his success.

Also, Mike Williams asks why so many people are obsessed with discovering their family origins and also learns new things about his own ancestors along the way.

(Photo: Asteroid heading towards Earth. Credit: Shutterstock)