Tesla reveals a new Roadster, due in 2020

At Tesla’s Semi event, the automaker dropped its new Roadster. It’ll have a 620-mile range via a 200kWh battery pack.”You’ll be able to travel from LA to San Francisco and back without recharging,” CEO Elon Musk said. The new Tesla Roadster will do zero to 60 in 1.9 seconds, and it’ll blast through a quarter mile in 8.9 seconds, before reaching a top speed of over 250 MPH.

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How Do Animals Recognize Each Other?

To be a giraffe among giraffes, or a pigeon among pigeons, is to live at all times in that scene from Being John Malkovich—a world in which everyone you know looks pretty much exactly like you. However wondrously varied the animal kingdom might be, on a species-level its residents tend to look more similar than not—at least, from a human perspective. I’m not saying that all squirrels look identical—just that being a squirrel, and trying to distinguish your squirrel-spouse from your squirrel dad from your squirrel-mailman, seems like it would be pretty hard work.

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