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This week in science

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Canadian California roll

In 1971, sushi was not widely consumed in North America. In fact, it wasn't popular at all. Chef Hidekazu Tojo, a Japanese chef new to Vancouver, British Columbia, needed to find a way in. So to appeal to western palates, he decided to flip traditional sushi rolls inside-out. By concealing the seaweed on the inside and packing the rolls with ingredients that Canadians were more familiar with—cucumber, cooked crab, and avocado—Tojo invented one of the most famous North American sushi rolls ever: the California roll.

'It’s-a Me, Mario!'

You know Mario—who could forget the cheery “woo-hoos!” of Nintendo’s most beloved video game character? Now meet Charles Martinet, the voice behind the iconic mustachioed man. It turns out, Martinet not only voiced Mario, he also created the voices for Wario, Luigi and even Donkey Kong!

Why parrots can talk

Monkeys are our closest biological relatives, and they can't speak. But parrots don’t seem to have a problem at all.