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YouTube / NYC DOT

How NYC's Street Signs are Made

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YouTube / NYC DOT

In Maspeth, Queens, a crew of 22 people makes 9,000 to 12,000 street signs each month in order to keep New York City streets properly marked. So how exactly do you make ten thousand signs with such a small crew? Plastics. Silk-screens, computer-assisted routers, and a lot of hand work go into the sign-making. Learn all about it in this surprising high-quality three-minute video from the New York City Department of Transportation:

This points to another somewhat surprising discovery: the NYC DOT has a YouTube channel, and it's kind of great. Check out their video about Jackson Heights for a good example. If you're a city infrastructure geek (and I know some of you are), this is hot stuff.

Related: A Day With NYC's Pothole Crew.

(Via Devour.)

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Sylke Rohrlach, Wikimedia Commons // CC BY-SA 2.0
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Animals
These Strange Sea Spiders Breathe Through Their Legs
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Sylke Rohrlach, Wikimedia Commons // CC BY-SA 2.0

We know that humans breathe through their lungs and fish breathe through their gills—but where exactly does that leave sea spiders?

Though they might appear to share much in common with land spiders, sea spiders are not actually arachnids. And, by extension, they don't circulate blood and oxygen the way you'd expect them to, either.

A new study from Current Biology found that these leggy sea dwellers (marine arthropods of the class Pycnogonida) use their external skeleton to take in oxygen. Or, more specifically: They use their legs. The sea spider contracts its legs—which contain its guts—to pump oxygen through its body.

Somehow, these sea spiders hardly take the cake for Strangest Spider Alive (especially because they're not actually spiders); check out, for instance, our round-up of the 10 strangest spiders, and watch the video from National Geographic below:

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The Biggest Thing to Happen in the East Room of the White House
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The East Room of the White House has been the location of many important events, but nothing will ever be as big as this one.

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