Friday March 20 2015  Lorna Sharpe, sub-editor Harvesting solar power in space one step closer Japanese engineering firm Mitsubishi has successfully transmitted a 10kW beam across a distance of 500 metres. While that’s a very small step towards the company’s stated target of harvesting solar energy from space, it’s actually a pretty remarkable achievement in its own right and one that must surely lead to some terrestrial applications. It will be worth watching progress on this. Carbon nanotube membranes to ‘take over’ water purification The world’s population is growing, and as lifestyles improve we all use a lot more water … Continue reading E&T news weekly #42 – we choose our favourite engineering and technology news stories from the week