Thu, 20 July 2017
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 on Triple J radio's Hack.
Fri, 14 July 2017
Hosts: Ed Brown, Dr. Shayne Joseph, Penny Dumsday, Sean Elliott
00:00:48 Sean talks about his Roughbot project, a programmable robot kit that introduces students to coding and robotics.
00:04:47 Every year, 1.2 million blue wildebeest migrate across East Africa, accompanied by around 200,000 zebra and antelope. At one point in their mass migration, however, they have to cross the mighty Mara River. Those that don't survive the crossing end up being crucial to the surrounding ecosystem.
00:11:13 Chinese researchers have for the first time ever sent entangled photons from space to ground stations on Earth. This record-breaking achievement could be the first step of a revolution in communications and encryption.
00:23:49 Scientists in Uganda have noticed that the hunting behaviour of chimpanzees has changed since humans began studying them.
00:34:17 Two researchers from Princeton and Harvard universities have come up with a theory to explain the different shapes of eggs from different bird species. It's all about aerodynamics!
This episode contains traces of Arnold Schwarzenegger talking to senior US Navy officials about climate change.
Sat, 8 July 2017
Hosts: Ed Brown, Penny Dumsday, Lucas Randall
00:00:40 We welcome Lucas back to the show, and discuss his battles with depression. Lucas recently blogged about dealing with mental health in the workplace, and how different managers respond to cases of depression.
00:10:34 After three detections of gravitational waves by the ground-based LIGO detector, the European Space Agency has given the go-ahead for the LISA space-based detector.
00:15:42 A data visualisation takes a deep look at the statistics of human birth. And while we tend to think of it as being a random process, there's a large spike in births at 8am.
00:19:42 The New Horizons spacecraft has a new target - Kuiper Belt Object MU69 - which recently came between Earth and a distant star. This caused a huge (and highly successful) global effort to view it with ground-based telescopes.
This episode contains traces of banter between former astronaut Buzz Aldrin and former bankrupt casino-owner President Donald Trump.