After more than fifty years, an American spacecraft is about to land on the moon again. It's a six-legged lander built by a private company called Intuitive Machine.

Dr Jonathan Webb says the mission is partly to pave the way and improve the success rate for future landing attempts, including with astronauts on board. 

Guest: Dr Jonathan Webb, ABC Science Editor

BRAINTEASER (Answer in audio):

    I have a bucket and two separate hoses: one hose fills the bucket in 5 minutes and the other in 15 minutes.    The bucket springs a leak, which can completely empty the bucket in 10 minutes.    If I run both hoses into the leaky bucket, how long will it take to fill up?