#259

More people in the US are getting bird flu. Though numbers are small – just five new cases, all mild – every new case is a reason for concern. How and why is it being transmitted – and how is it being monitored?

What if you could make a sailboat that’s pushed not by wind, but lasers? Breakthrough Starshot is a mission attempting to send a spacecraft to our nearest star system, Alpha Centauri, using such a lightsail. While lightsail designs have been too expensive and unworkable so far, a new prototype is looking promising.

Climate change is threatening a key part of the global climate system. The Atlantic Meridional Ocean Circulation (AMOC) system transports heat and salinity between the tropics and the poles. Scientists have ongoing concerns about its stability, but it’s now showing signs of potential collapse much sooner than expected. And if it does shut down, the knock-on effects would be drastic.

What makes a planet a planet? Defining this is what knocked Pluto off planetary status, but now one researcher has proposed a new set of criteria. Is the new method useful – and does it change which objects are considered planets?

Believe it or not – sea slugs hunt in packs. A species of sea slug has been seen ganging up on brown sea anemones to avoid its poisonous tentacles. How are they capable of teaming up like this?

Hosts Rowan Hooper and Christie Taylor discuss with guests Grace Wade, Alex Wilkins, Madeleine Cuff and Sophie Bushwick.

To read more about these stories, visit newscientist.com.

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#258

Fancy a bite of woolly mammoth jerky? A beef-jerky-like fossil of this prehistoric creature has been discovered – a metre-long piece of skin still covered in hair. And the most amazing thing is that the entire genome has remained intact, giving more insight into these creatures than ever before. Could this help bring woolly mammoths back to life?

There is a way to make butter not from cows, not from vegetable oils or even microbes, but from pure carbon. And if you want a climate friendly way of producing a delicious spreadable fat, this may just be it. A company called Savor is using a process that can convert captured CO2 or natural gas into fatty acids.

The origin of life is a huge scientific mystery: how can something so complex emerge from inert and random molecules? Well, Google has created a simulation to figure this out. The company has used computer code to recreate the random ‘primordial soup’ of early Earth, with results that might baffle you.

When mammals breastfeed, calcium is stripped from their bones to make the milk, but their bones don’t get significantly weaker. How does that work? Well, a new, bone-strengthening hormone found in mice may have finally solved the long-standing mystery – and could benefit human health.

Plus: How our pupils change size with every breath; how cosmic rays could help protect financial markets; and how ancient Denisovan DNA may have helped the people of Papua New Guinea adapt to their environment.

Hosts Timothy Revell and Christie Taylor discuss with guests Corryn Wetzel, Madeleine Cuff, Matthew Sparkes and Grace Wade.

To read more about these stories, visit newscientist.com.

Hosted on Acast. See acast.com/privacy for more information.

#257

Two extraordinary findings have been unearthed about our ancient ancestors. The first is a discovery from a cave in Australia – evidence of what could be the world’s oldest ritual, practised continuously for 12,000 years. And the second is the discovery that the world’s oldest evidence of storytelling may be even older than we thought.

We may be able to mine for nickel using flowers. The method is much more sustainable than traditional mining and is actually being used by some companies. Is it enough to turn mining green?

Quantum communication is going wireless. The new chip responsible for this quantum Wi-Fi is a huge step forward for the technology and could speed up the creation of safer, unhackable internet networks.

From onboard a kayak roaming the Arctic Ocean, Rowan Hooper brings a report from his trip to Svalbard, where he saw first-hand the retreating glaciers that have been melting rapidly due to climate change. As these glaciers disappear, soil is being exposed for the first time. What impact is this having on the landscape? Rowan speaks to arctic biogeochemist James Bradley of Queen Mary University, London.

Plus: The first non-human animal to perform medical amputations; giving the moon a time-zone; and how eggshells can help regrow broken bones.

Hosts Timothy Revell and Christie Taylor discuss with guests James Woodford, James Dinneen, Karmela Padavic-Callaghan, Rowan Hooper and James Bradley.

To read more about these stories, visit newscientist.com.

Hosted on Acast. See acast.com/privacy for more information.