Participants who had handled puzzle pieces that werecovered in sandpaper rated the interaction as more adversarial and harsh thanthose who had handled smooth pieces.
Despite this, one company thinks lithium-ion batteries can now be made robust enough to power some really big, demanding kit-such as tugboats, dockside cranes and super-yachts.
The Libyan leader's colourful behaviour, including a taste for Amazonian bodyguards, led much of the world to conclude that he was unstable as well as dangerous.
Bipolar disorder also known as manic-depressive illness, is believed to affect about 1% to 3% of the population, and is characterized by unusual shifts in mood, energy and activity levels.