Where to find the chatbot online. Tributes pour in for former Youtube CEO Susan Wojcicki. Explained: Why horses are a lot smarter than previously thought. Perseid meteor shower: How you can see the shooting stars. Also in this episode:

• Folding implants that expand in the brain ‘could make epilepsy surgeries safer’
• Eco Wave Power officially kicks off the first MW Scale Wave Energy Project in Portugal
• Blasting 'glitter' into Mars' atmosphere could make it more habitable, say US scientists

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