Jan 18: Climate scientists as physicians of the planet, and more
Ancestors didn't eat meat, robotic bees, the rare marsupial mole, and a cosmic conveyer belt.
On this week's episode of Quirks & Quarks with Bob McDonald:
One of the main reasons scientists think we became so smart is because at some point in our evolutionary past, our ancestors started eating energy-dense meat to fuel the growth of large brains. However it hasn't been clear when this started. Using a new technology, scientists were able to analyze the tooth enamel of seven 3.5 million year old Australopithecines to directly measure their meat consumption. Tina Lüdecke, from the Max Planck Institute for Chemistry, said it revealed they were primarily herbivores so meat eating would have had to come later in our evolutionary history. Their study was published in the journal Science.
Bees do an incredibly important job pollinating crops and wild plants. Now scientists in the US are trying to emulate their skills with a tiny robot bee that has all the agility and ability of the real insect. They hope eventually they can be used in indoor factory farms where real bees can't survive. Kevin Chen, associate professor of Electrical Engineering and Computer Science at M.I.T and PhD candidate Suhan Kim were a part of this project. Their research was published in the journal Science Robotics.
In the southern desert of Australia, there lives an elusive and unique animal - the marsupial mole. It lives under the sand and is so rare that very few people have ever seen it. Scientists have now published the very first genetic research on this animal in the journal Science Advances, thanks to tissue samples donated by a local museum. Sarah Lucas is a postdoctoral research associate at the University of Münster, Germany, and was part of the team.
Elements like carbon, nitrogen and oxygen that are essential to life were forged in supernovae billions of years ago. Now new research is helping to explain how these elements – especially essential carbon – were concentrated in such a way as to be plentifully available for the chemistry of life. The study, led in part by astronomer Trystyn Berg, discovered a cosmic conveyer belt funneling carbon in and out of our galaxy over billions of years. The research was published in the Astrophysical Journal Letters.
The stereotype of a scientist is a dispassionate, objective and neutral seeker of nature's truths, and many think that this makes a career in science incompatible with political activism. Canadian climate scientist Katherine Hayhoe thinks that this is a mistake. She sees her role more like that of a physician for the planet – diagnosing its ills and advocating for the health of her patient, and her patient's inhabitants. She recently co-authored a paper in the journal Nature Climate Action arguing her case.
READ MORE: Prominent climate scientist argues it's time to ditch the 'myth of neutrality'
