Cancers pretend to be ‘super fit’ to steal nutrients from healthy cells. Weight-loss jab approved for use in UK to prevent heart attacks and strokes. Video footage shows breaching whale capsize boat. Sharks found in waters off Brazil test positive for cocaine. Also in this episode:

• Data watchdog reprimands school over facial recognition for canteen payments
• Calls to rethink smartphone use for under 18s to improve mental health
• Elon Musk: Tesla will begin using humanoid robots next year

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