SciNews, Thursday, September 22, 2016


Shark teeth; “five-second rule” debunked; benefits of high factor sunscreen; beliefs about earth’s origin; sample of asteroid to be retrieved – just a few of the themes in today’s eclectic collection of SciNews.  Share these stories with your students and get them excited about science.

SciNews is published twice weekly. Stay tuned for more.

7308778_s from 123rfBiology

How do shark teeth bite? Reciprocating saw, glue provide answers. Science Daily

A recent study sought to understand why shark teeth are shaped differently and what biological advantages various shapes have by testing their performance under realistic conditions.  Read more…

Researchers debunk ‘five-second rule’: Eating food off the floor isn’t safe. Science Daily

Turns out bacteria may transfer to candy that has fallen on the floor no matter how fast you pick it up. Rutgers researchers have disproven the widely accepted notion that it’s OK to scoop up food and eat it within a ‘safe’ five-second window.  Read more…

Chemistry

13698187_s from 123rf

High factor sunscreen can decrease the risk of melanoma by 33%. Science Daily

Using high factor sunscreen compared with low factor sunscreen can decrease the risk of melanoma by 33%, new research demonstrates. Melanoma is the cancer with the strongest increase in incidence in the last decade.  Read more…

18685938_s from 123rf

Earth and Space Science12693495_s from 123rf

New discovery shatters previous beliefs about Earth’s origin. Science Daily

A new study demonstrates that the Earth and other planetary objects formed in the early years of the Solar System share similar chemical origins — a finding at odds with accepted wisdom held by scientists for decades.  Read more…

Ambitious mission to fetch asteroid sample lifts off. Globe and Mail

An ambitious journey to retrieve a sample of a distant asteroid is under way.

Like a fiery white dart set against an all but cloudless blue sky, NASA’s OSIRIS-REx spacecraft lifted off atop its Atlas V rocket at Cape Canaveral, Fla., on Thursday evening.  Read more…

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