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Tsunami alert for Puerto Rico after 7.6-magnitude earthquake in Caribbean

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Earlier tsunami threat to Puerto Rico and the US and British Virgin Islands is cancelled after powerful and shallow quake A 7.8-magnitude earthquake in central America has led to a tsunami warning for Puerto Rico, and the US and British Virgin Islands. Photograph: US Tsunami Warning Center . An earthquake of magnitude 7.6 that struck in the Caribbean sea on Tuesday was felt across northern Central America, briefly prompting a tsunami warning for disaster-hit Puerto Rico and the British and US Virgin Islands.The US Tsunami Center later cancelled the alert but warned some parts of Honduras and Belize were still at risk from waves of up to a metre. A new challenge looms for British Virgin Islands: how to clean up hurricane mess   The quake – which hit at 10.52pm local time – rattled windows in the Honduran capital of Tegucigalpa r...
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MilliDelta robot surgeon is the size of a one cent coin

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MilliDelta robot surgeon is the size of a one cent coin The miniature bot can move much faster than its counterparts. Another tiny  robot  is gearing up to  join  the  ranks  of  microsurgeons , but this one is small enough to fit in your coin purse. Inspired by pop-up books and origami, the  milliDelta bot  measures mere millimetres when unfolded (roughly the size of a one cent coin). But, even at that scale, the miniature helper packs flexible joints and bending, piezoelectric actuators that allow it to work with force, precision, and high speed. Its creators (from Harvard's Wyss Institute for Biologically Inspired Engineering and the John A. Paulson School of Engineering and Applied Sciences) claim it can perform a range of microsurgery and manufacturing tasks in compact spaces. Its creators (from Harvard's Wyss Institute for Biologically Inspired Engineering and the John A. Paulson School of Engineering and Applied Sciences)...
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Bitcoin, Ethereum and almost every other cryptocurrency is plunging

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Look away now if you own bitcoin or other cryptocurrencies. This won’t be breaking news to you if you are invested, but today has seen the entire crypto market fall by double-digit percentages. The price of bitcoin slumped by 15 percent to drop below $12,000 for the first time since December 4. Ethereum, meanwhile, fell by over 20 percent to hover above $1,000 and Ripple is down 33 percent to $1.23 at the time of writing. The price drop is having a huge impact.  According to Coinmarketcap.com , a site that is quickly becoming the go-to price checker, just one of the top 100 highest valued cryptocurrencies isn’t in the red over the past 24 hours. That’s Tether. It’s a far cry from when bitcoin hit a record of close to $20,000 exactly a month ago on December 16. Despite the drop, Ethereum, Ripple and the rest of the alt coins have largely fared worse than bitcoin. The top 10 based on coin market caps… Numbers 11-20… Finally, a little green ink at number 25…...
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