A major four-day week trial has shown most companies see massive staff mental health benefits and profit increase. Are we one step closer to the end of HIV? Researchers say third person ever has been cured after stem cell transplant. Plus, have archaeologists found Britain’s ‘oldest sex toy’?

Also in this episode:

• WhatsApp’s latest iOS update finally lets you multitask on video calls
• First woman appointed UK's chief scientific adviser
• Stroke survivor moves hand for first time in nine years after spinal stimulation
• Spain to extradite British suspect to US over Twitter hack
• The billion pound science superyacht 

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