Biology

Sweat pours down her face. She feels thirsty. Swatting at mosquitoes, Biruté Galdikas balances on a slippery log. The logs are always slippery. “I don’t know why, but they always are,” she thinks. Then she slips. She tries to avoid touching a thorn vine and a tree with toxic bark as she regains her balance. She stands waist-deep in tea-coloured swamp water in the dark,...

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Q:

I am trying to find out how much light curves at the Earth's surface due to gravity. Ideally, how much does light drop over a given distance?

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In the news

Take two parasites and call me in the morning

July 26, 2014

Two recent papers suggest that some parasites may be good for us. UBC botanist Laura Wegener-Parfrey and Julius Lukeš of the Canadian Centre for Advanced Research question our traditional perception of intestinal parasites. The papers offer a systematic review of cases where humans have deliberately ingested parasites for research and suggest that certain parasites could have beneficial effects on conditions such as Crohn's disease and Irritable Bowel Syndrome. More at Science Media Centre of Canada.

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