Science On Top

Hosts: Ed Brown, Penny Dumsday, Lucas Randall. 00:01:03 The Ancient Romans built sea walls with concrete that is still standing in many places today. What made their concrete so much stronger than modern concrete? 00:08:24 The chances of finding life on Mars grew even slimmer after a study found chemicals in the Martian soil are highly toxic. 00:15:54 Animals that use tools aren't uncommon, and neither are animals that make sounds to attract mates. But the Palm cockatoo could be the first non-human animal to do both - they use tools to make music. 00:28:47 In 1977 the Voyager spacecraft were launched carrying the Golden Records - gold-plated copper records containing images, sounds and music from Earth. And in one small segment of the record there's the sound of a man laughing. Adrienne LaFrance at The Atlantic wrote about her intensive investigation to track down who that man was and why his laughter is on a billion-year time capsule.   This episode contains traces of Al Gore talking about climate change