Does more than 2 hours of screen time really harm children's brains?
28 September 2018
A study says that children do better academically if they limit screen time, but that doesn’t necessarily mean it is time to ban their phones
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Premium
Ultrasonic micro-explosions can harvest gold from old SIM cards
3 April 2018
We waste $22 billion in gold from electronics that are tossed out instead of recycled. A new technique uses ultrasound to harvest that precious metal from SIM cards
Good news: Demand for coal is plummeting towards a record low
19 December 2017
The global demand for coal has fallen 4.2 per cent over the last two years, one of the biggest drops on record
Bacteria engineered to produce living, full-colour photographs
22 May 2017
Gut bugs have been modified to turn red, green or blue when bathed in light of the corresponding colour so they create bacterial photocopies
