Two important barriers to a stable, powerful fusion reaction have been leapt by an experiment in a small tokamak reactor, but we don’t yet know if the technique will work in larger devices
Prospectors around the world are scrambling to find reserves of "gold hydrogen", a naturally occurring fuel that burns without producing carbon dioxide. But how much is really out there and how easy is it to tap into?
Excitement is growing over hints Earth has vast reserves of carbon-free natural hydrogen that we could extract and burn to power our economies, but it is way too soon to declare it a climate saviour