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How much of a risk is space junk?

Also, sex before sport and how oceans influence how hot it is.

• 28 mins

Going for gold

Turning e-waste into jewellery and the genetics of a gold medal Olympian.

• 28 mins

Beavers of London

As beaver kits arrive in London, we ask if we should bring wilderness back to UK cities.

• 28 mins

Why aren鈥檛 we eating more insects?

We try some cricket tacos 鈥� and ask what role insects might play in our future diets.

• 27 mins

Predicting everything

Also, the latest on Alzheimer's drugs and how we work out Paralympic classifications.

• 30 mins

The Grenfell cladding

Why was the Grenfell Tower cladding so dangerous?

• 28 mins

The first civilian spacewalk

Also, the science of what we do with our nuclear waste and why.

• 27 mins

Is lab-grown meat the future of food?

From how it's made to farmers' perceptions, a deep dive into the edible innovation.

• 27 mins

How green is space travel?

We discuss whether a boom in space travel could be a problem for Earth鈥檚 climate.

• 28 mins

Could coal shut-down mark new era for energy?

What difference will closure of the UK鈥檚 last coal-fired power station make?

• 28 mins

Should we bring back extinct animals?

A US company claims it will bring back a woolly mammoth by 2028 鈥� how and why?

• 28 mins

Are our carbon sinks failing?

What鈥檚 happening to our carbon sinks?

• 30 mins