Dec. 15, 2018: Is China winning the race to the moon, pig heart transplants, cute aggression and more…

Dust is alive, frogs sing in the city and science engineers the perfect christmas tree

Pictures of adorable baby animals can trigger "cute aggression" in many people, which might manifest as a desire to eat up their darling little toesies. (VYACHESLAV OSELEDKO/AFP/Getty Images)

Listen to the full episode53:49