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July 16, 2019

16
Jul
2019

Ant-sized robots move by pickin' up good vibrations

One of them seen here next to a US penny, the robots weigh about 5 milligrams ...

If you're making a 2-mm-long walking robot, it pretty much goes without saying that the thing won't be able to carry much of a battery. That's why Georgia Tech's new "micro-bristle-bots" are instead propelled by vibrations. And someday, they may actually be capable of moving within the human body.

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Category: Robotics

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16
Jul
2019

How do you build Stonehenge? Add lard

Lard may have greased the skids used to haul the giant megaliths of Stonehenge

According to a recent Newcastle University study, if you want to build a replica of Stonehenge, get some lard – lots of it. By studying neolithic pottery from a site near the ancient stone circle, archaeologists suggest that the traces of pig fat weren't the result of cooking, but were used as a lubricant to help move the gigantic megaliths that now stand on the Wiltshire landscape.

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Category: Science

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16
Jul
2019

Wearable device harvests energy from bending of the knee

A diagram of the energy-harvesting device

As compared to most other joints in the human body, the knee has quite a large range of motion … so why not put that motion to use, as a source of electricity? That's what a new prototype device does, and it reportedly does not cause its wearer to expend more energy while walking.

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Category: Energy

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