Supervolcano may be brewing beneath Mount St Helens
![](http://www.newscientist.com/data/images/ns/cms/mg20227124.700/mg20227124.700-1_300_thumbnail_70_100.jpg)
Peering beneath the US volcano suggests that it may be connected to an extraordinarily large zone of semi-molten rock, which would be capable of feeding a giant eruption
Broken dwarf planet may have scarred the moon
![](http://www.newscientist.com/data/images/ns/cms/mg20227115.600/mg20227115.600-1_300_thumbnail_70_100.jpg)
The shattered remnants of a dwarf planet may have bombarded the inner planets in the early solar system, suggests a new analysis of craters on the moon
Betelgeuse: The incredible shrinking star?
![The red supergiant Betelgeuse would extend to Jupiter if it were put in the sun's place in the solar system. A new study suggests it has shrunk by more than 15 per cent since 1993 (Image: A. Dupree/CFA/R. Gilliland/STScI/NASA/ESA)](http://www.newscientist.com/data/images/ns/cms/dn17282/dn17282-1_300_thumbnail_70_100.jpg)
New observations suggest the bright red star in the constellation Orion has shrunk by more than 15 per cent since 1993
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