The latest stories from the Science & Environment section of the BBC News web site.
Hubble re-shoots 1987 star blast
The Hubble space telescope returns to view one of its favourite subjects - a giant stellar explosion first seen from Earth in 1987.
Danish rocketeers postpone launch
A group of Danish rocket enthusiasts trying to launch a dummy 30km into the sky abort the mission when a valve on their rocket freezes up.
Plans for solar 'close encounter'
Nasa is aiming to get closer to the Sun than ever before, with plans to plunge a car-sized unmanned spacecraft into the star's outer atmosphere.
Reading Arabic 'hard for brain'
Israeli scientists believe they have identified why Arabic is particularly hard to learn to read.
Wolves fail to halt aspen decline
The re-introduction of wolves to a US National Park has not helped re-establish quaking aspens, as many researchers had hoped.
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