In this episode:
00:30 Early humans pushed to brink of extinctionAround 900,000 years ago the ancestors of modern humans were pushed to the brink of extinction, according to new research. Genetic studies suggest that the breeding population of our ancestors in Africa dropped to just 1,280 and didn’t expand again for another 117,000 years. This population crash would likely have had an impact on human genetic diversity, and may have driven the evolution of important features of modern humans, such as brain size.
Nature News: Human ancestors nearly went extinct 900,000 years ago
Poor historical waste practices have left high levels of pollution around Antartica’s research facilities. By surveying the seafloor near Australia’s Casey research station, researchers have revealed high concentrations of hydrocarbons and heavy metals.This pollution is likely to be widespread, but its impact on the continent is unknown.
Nature News: Antarctic research stations have polluted a pristine wilderness
Persistently low levels of sea-ice around Antarctica have caused emperor penguins to abandon their breeding colonies early, resulting in the death of large numbers of chicks. Although the affected populations only represent a small number of the total emperor penguins on the continent, it’s unclear how they’ll fare if trends in sea-ice melt continue.
Science: Emperor penguins abandon breeding grounds as ice melts around them
Researchers have developed an artificial-intelligence that can describe how compounds smell by analysing their molecular structures. The system’s description of scents are often similar to those of trained human sniffers, and may have applications in the food and perfume industries. Currently the AI works on individual molecules, and is unable to identify the smells associated with complex combinations of molecules, something humans noses do with ease.
Nature: AI predicts chemicals’ smells from their structures
Subscribe to Nature Briefing, an unmissable daily round-up of science news, opinion and analysis free in your inbox every weekday.
Hosted on Acast. See acast.com/privacy for more information.
Coronapod: the latest on COVID and sporting events
How the US is rebooting gun violence research
Coronapod: Does England's COVID strategy risk breeding deadly variants?
How deadly heat waves expose historic racism
Coronapod: Will COVID become a disease of the young?
Food shocks and how to avoid them
Coronapod: the biomarker that could change COVID vaccines
The scientist whose hybrid rice helped feed billions
Audio long-read: How COVID exposed flaws in evidence-based medicine
Coronapod: should you have a COVID vaccine when breastfeeding?
Quantum compass might help birds 'see' magnetic fields
CureVac disappoints in COVID vaccine trial
Communities, COVID and credit: the state of science collaborations
Coronapod: Counting the cost of long COVID
Google AI beats humans at designing computer chips
Coronapod: Uncertainty and the COVID 'lab-leak' theory
On the origin of numbers
New hope for vaccine against a devastating livestock disease
Audio long-read: How harmful are microplastics?
The 'zombie' fires that keep burning under snow-covered forests
Create your
podcast in
minutes
It is Free