Plutonium from nuclear weapons, industrial waste, and human activity more broadly have left such a mark on the Earth that a new epoch called the Anthropocene has been proposed. Scientists are debating the specific geological site to define this epoch, with the frontrunner being an unassuming lake in Canada: Crawford Lake. What is it about this spot that holds the secrets to this period of history? From hydrogen bombs to hens’ bones, how do we define the Anthropocene, the beginning of the human era on Earth? Ian Sample asks Damian Carrington. Help support our independent journalism at theguardian.com/sciencepod

Canadian lake could mark the start of new geological epoch

Twice a week, the Guardian brings you the latest science and environment news

Science

On Tuesday a British man died and several others were injured when their plane encountered severe turbulence between London and Singapore. And it looks like this kind of turbulence is something we’ll have to get used to. Last year a study found severe clear-air turbulence had increased by 55% between 1979 and 2020. Ian Sample speaks to Guy Gratton, associate professor of aviation and the environment at Cranfield University, to find out why this is happening, and whether there’s anything we can do to reverse the trend.. Help support our independent journalism at theguardian.com/sciencepod

Why is air turbulence getting worse?

Right now, across much of the midwestern and eastern US, trillions of cicadas are crawling out from the soil. And this year is extra special, because two broods are erupting from the ground at once. The first brood hasn’t been seen for 13 years, the other for 17 years and the last time they emerged together Thomas Jefferson was president. Ian Sample speaks to entomologist Dr Gene Kritsky to find out what’s going on, why periodical cicadas emerge in cycles of prime numbers and how they keep time underground. Help support our independent journalism at theguardian.com/sciencepod

In their prime: how trillions of cicadas pop up right on time

Last week the founder of the dating app Bumble forecasted a near future dating landscape where AI ‘dating concierges’ filter out prospective partners for us. But does AI, or even science, really understand what makes two people compatible? Madeleine Finlay speaks to Amie Gordon, assistant professor of psychology at the University of Michigan, to find out what we know about why two people go the distance, and why she and her colleague associate professor of sociology Elizabeth Bruch, are designing their own dating app to learn more.. Help support our independent journalism at theguardian.com/sciencepod

AI, algorithms and apps: can dating be boiled down to a science?

As AI systems have grown in sophistication, so has their capacity for deception, according to a new analysis from researchers at Massachusetts Institute of Technology (MIT). Dr Peter Park, an AI existential safety researcher at MIT and author of the research, tells Ian Sample about the different examples of deception he uncovered, and why they will be so difficult to tackle as long as AI remains a black box. Help support our independent journalism at theguardian.com/sciencepod

Backstabbing, bluffing and playing dead: has AI learned to deceive?

Sales of cottage cheese are booming thanks to a boost from protein-hungry social media influencers. But do we really need all this extra protein? Madeleine Finlay speaks to Joanne Slavin, a professor of food science and nutrition at the University of Minnesota, to find out what exactly protein is doing in our bodies, and what happens to it when we consume it in excess. Help support our independent journalism at theguardian.com/sciencepod

Canadian lake could mark the start of new geological epoch

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