Joe Biden has given Ukraine the green light to use long-range weapons against Russia for the first time. Could pond-life power future space missions to Mars? We speak to Erik Gauger, professor in quantum theory at Heriot-Watt university’s Institute of Photonics and quantum sciences.

Plus, hear the voice of King Richard III, created using state-of-the-art technology.

Also in this episode:

Dark side of the moon: volcanoes erupted on far side for over a billion years

Cocoa may protect against negative effects of fatty foods when stressed

Now That’s What I Call: A very small Casio smart ring

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Biden authorises Ukraine to use long-range missiles against Russia