A 'spacetime crystal' sounds like something Doctor Who might keep in his kit-bag - but it's actually much more dramatic than that: a clock that could keep perfect time forever, even after the heat-death of the universe.
Berkeley Lab scientists have found a way to make harmless viruses harvest mechanical energy, which could then be used, say, to charge a phone as its owner walks along.
Berkeley Lab scientists are soon to move into clinical trials of a pill that can decontaminate people after exposure to radiation.
How can scientists and manufacturers make fuel cells and fuel cell technology a viable and affordable alternative to fossil fuels?
Thawing permafrost could release billions of tons of carbon into the atmosphere by the end of this century, further accelerating global warming.