As the first piece of an asteroid is brought back to Earth in Japan's Hayabusa mission, it's been suggested that we could mine the worlds of the Solar System for useful materials and minerals. What's up there?
Research is revealing that our memories aren't as sturdy as we think. If it becomes possible to chemically delete our memories - perhaps of a war-time incident - is it right to, or would we be deleting our history?
The history books regard Albert Einstein as a genius which is no small wonder: his theories encompass everything from the atom to the cosmos, and underpin technologies from solar cells to sat-nav. But a slew of new discoveries threaten to turn him into the passé professor.