Low Gravity

Very interesting.

If it seems Canadians weigh less than their American neighbours, they do – but not for the reasons you might think. A large swath of Canada actually boasts lower gravity than its surroundings.

Researchers have puzzled for years over whether this was due to the crust there rebounding slowly after the end of the last ice age or a deeper issue involving convection in the Earth’s mantle – or some combination of the two.

Now, ultra-precise measurements taken over four years by a pair of satellites known as GRACE (Gravity Recovery and Climate Experiment) reveal that each effect is equally responsible for Canada’s low gravity. The work could shed light on how continents form and evolve over time.

I’ll refrain from making jokes about Canadians being lightweights.

Too bad it doesn’t have any numbers to play with.

Posted by Macker  on  05/11  at  06:04 PM
Page 1 of 1 pages

<< Back to main