Biology

Richard Rozmahel passes time by reading the bulletin board hanging above the wheezing printer attached to the DNA sequencer. There’s an advertisement from a company selling genetic research chemicals. They’re offering a free T-shirt sporting the words: Ultra Pure Human Being. At the bottom of the ad he reads, “Send six peel-off seals from any GIBCO BRL Enzymes and receive an...

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Q: Why is a magnet classified as dangerous goods when shipping by air?

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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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