Dolph Schluter stands atop the craggy outpost of a twenty-metre high clifftop, his gaze intently focused on the waves below him. From his vantage point, he can see the fishing boat that has come to take him off Los Hermanos, a remote island in the Galapagos archipelago. But it's not much use. The seas are too rough and the steep shoreline of the jagged volcanic rock would smash to pieces any boat...

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Q: For some reason, it is common knowledge in this community that when subjected to cold, hot water will freeze before cold water. Is there ANY basis for this belief?

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In the news

Canadian scientists solve knuckle-cracking riddle

April 15, 2015

Scientists at the University of Alberta used MRI video to determine what happens inside finger joints to cause the distinctive popping sounds heard when cracking knuckles. For the first time, they observed that the cause is a cavity forming rapidly inside the joint. Watch the video available at the UofA Faculty of Rehabilitation Medicine.

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