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Watch 11,000 Marbles Run Wild

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Some people build model trains. Some people play video games. Jelle Bakker, known as The Marble Master, builds super-complex Rube Goldberg machines for his tens of thousands of marbles to run through. It's good to have a hobby.

In this video, we see the Marble Tsunami, a giant contraption through which 11,000 marbles flow. As they roll along, the marbles set off chimes, hit bells and bumpers (like in a pinball game), go around loops, tip trays, and do other rather impressive mechanical things. The most incredible aspect is the sound of these things clattering; when installed, Bakker promises sound-dampening material to protect viewers' ears. (This thing is going on display this month at the Gouda Monkey Town Indoor Playground in The Netherlands.) For now, just turn down the sound.

Prepare to lose your marbles.

Fun fact: This kind of machine is called a "knikkerbaan," which roughly translates to "marble lane." (Thank you, reader Miranda Kate!)

(Via the always-excellent The Kid Should See This.)

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RODRIGO ARANGUA/AFP/GettyImages
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Animals
Listen to the Impossibly Adorable Sounds of a Baby Sloth
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RODRIGO ARANGUA/AFP/GettyImages

Sometimes baby sloths seem almost too adorable to be real. But the little muppet-faced treasures don't just look cute—turns out they sound cute, too. We know what you're thinking: How could you have gone your whole life without knowing what these precious creatures sound like? Well, fear not: Just in time for International Sloth Day (today), we have some footage of how the tiny mammals express themselves—and it's a lot of squeaking. (Or maybe that's you squealing?)

The sloths featured in the heart-obliterating video below come from the Sloth Sanctuary of Costa Rica. The institution rescues orphaned sloths, rehabilitates them, and gets them ready to be released back into the wild.

[h/t The Kid Should See This]

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Martin Smith Studio
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Mesmerizing Metal Machines
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Martin Smith Studio
5612898127001

Martin Smith's metal machines are mesmerizing. They ripple like water, flap like birds, and undulate in seamless elegant motion. See more amazing automata on Instagram.

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