Scientists in Wales are looking at how slag heaps can be used to remove CO2 from the air in the fight against climate change.
View at DailyMotion
A US company has produced an ultrasound scanner that plugs into an iPhone and costs $2,000 (£1,555). View at DailyMotion
A door that locks away small parcels and calls the police if larger ones are stolen is at CES. View at DailyMotion
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