But the key to sparing the stomach, many scientists believe, also puts patients at risk for heart attacks and strokes.

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But those findings were based on limited observations, and many scientists considered them to underestimate the melting.

WSJ: Polar Ice Sheets Melt at Faster Pace

As an institution, CRU has survived the episode with its main scientific staff still functioning, but with reforms to its operation in terms of increased openness - changes that many mainstream scientists believe will be beneficial to all in the long run.

BBC: 'ClimateGate': Case closed?

No-one knows how many people die of deep vein thrombosis a year but some scientists argue up to 10% of cases could be flight-related.

BBC: You are in: Health

All drugs have side effects, some are quite severe, but the role of scientists and the FDA is to evaluate these relative risks against potential benefits following many years of extensive and reputable scientific testing.

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Whether Holmes was bad or mad when he allegedly caused so much misery to so many people will not get resolved by a technique beloved by Hollywood movie directors but not by scientists.

CNN: 'Truth serum' won't reveal mind of James Holmes

But the scientists conjecture that use of sunstones may have persisted for many centuries as a back-up to the often unreliable magnetic compass, which was introduced in Europe in the 13th Century.

BBC: 'Viking sunstone' found in shipwreck