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Author: Kinja! on Kinja Roundup, shared by Virginia K. Smith to Lifehacker

What Did You Think of the 2018 Fitness Challenges? 

Before we head off into the land of hope and awesomeness that is 2019, we have a few hours left to take stock of how far we’ve come in the past year. I’m preparing next year’s fitness challenges and want to hear what you thought of the ones we just did. What did you love? What motivated you to keep going?

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Author: Beth Skwarecki on Vitals, shared by Beth Skwarecki to Lifehacker

Tell Us Your Best Cancún Travel Tips

Cancún is already pretty well-packaged for tourists. So this week’s Hack Your City is a challenge: what lays undiscovered in this young city? What has sprung up outside the crowded strip of beach resorts? And what tricks help locals get by in this tourist-dominated town?

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Author: Nick Douglas

Charge Smarter In 2019 With Amazon’s New Year’s Eve Anker Sale

Amazon’s bringing the year to a close with a Gold Box sale on several popular Anker products, spanning a variety of categories. The PowerPort Cube power strip was probably the biggest new hit with our readers this year, but who couldn’t use a new Qi pad, a 5-port charging hub, or a USB-C hub for their laptop? For the…

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Author: Shep McAllister on Kinja Deals, shared by Shep McAllister to Lifehacker

The New Horizons probe buzzes the most distant object ever encountered first thing tomorrow

Four billion miles from Earth, the New Horizons probe that recently sent such lovely pictures of Pluto is drawing near to the most distant object mankind has ever come close to: Ultima Thule, a mysterious rock deep in the Kuiper belt. The historic rendezvous takes place early tomorrow morning.

This is an encounter nearly 30 years in the making, if you count back to the mission’s beginnings in 1989, but it’s also been some 13 years since launch — the timing and nature of which was calculated to give the probe this opportunity after it had completed its primary mission.

New Horizons arrived at Pluto in the summer of 2015, and in its fleeting passage took thousands of photos and readings that scientists are still poring over. It taught us many things about the distant dwarf planet, but by the time it took its extraordinary parting shots of Pluto’s atmosphere, the team was already thinking about its next destination.

Given the craft’s extreme speed and the incredibly distant setting for its first mission, the options for what to investigate were limited — if you can call the billions of objects floating in the Kuiper Belt “limited.”

In fact the next destination had been chosen during a search undertaken in concert with the Hubble Space Telescope team back in 2014. Ground-based reconnaissance wasn’t exact enough, and the New Horizons had to convince Hubble’s operators basically to dedicate to their cause two weeks of the satellite’s time on short notice. After an initial rejection and “some high-stakes backroom maneuvering,” as Principal Investigator Alan Stern describes it in his book about the mission, the team made it happen, and Hubble data identified several potential targets.

Ultima Thule as first detected by New Horizons’ LORRI imager.

2014 MU69 is a rock of unknown (but probably weird) shape about 20 miles across, floating in the belt about a billion miles from Pluto. But soon it would be known by another name.

“Ultima Thule,” Stern told me in an interview onstage at Disrupt SF in September. “This is an ancient building block of planets like Pluto, formed 4 billion years ago; it’s been out there in this deep freeze, almost in absolute zero the whole time. It’s a time capsule.”

At the time, he and the team had just gotten visual confirmation of the target, though nothing more than a twinkle in the distance. He was leaving immediately after our talk to go run flyby simulations with the team.

“I’m super excited,” he told me. “That will be the most distant exploration of any world in the history of not just spaceflight, but in the history of human exploration. I don’t think anybody will top that for a long time.”

The Voyagers are the farthest human-made objects, sure, but they’ve been flying through empty space for decades. New Horizons is out here meeting strange objects in an asteroid belt. Good luck putting together another mission like that in less than a few decades.

In the time I’ve taken to write this post, New Horizons has gone from almost exactly 600,000 kilometers away from Ultima Thule to less than 538,000 (and by this you shall know my velocity) — so it’ll be there quite soon. Just about 10 hours out, making it very early morning Eastern time on New Year’s Day.

Even then, however, that’s just when New Horizons will actually encounter the object — we won’t know until the signal it sends at the speed of light arrives here on Earth 12 hours later. Pluto is far!

The first data back will confirm the telemetry and basic success of the flyby. It will also begin sending images back as soon as possible, and while it’s possible that we’ll have fabulous pictures of the object by the afternoon, it depends a great deal on how things go during the encounter. At the latest we’ll see some by the next day; media briefings are planned for January 2 and 3 for this purpose.

Once those images start flowing in, though, they may be even better in a way than those we got of Pluto. If all goes well, they’ll be capturing photos at a resolution of 35 meters per pixel, more than twice as good as the 70-80 m/px we got of Pluto. Note that these will only come later, after some basic shots confirming the flyby went as planned and allowing the team to better sort through the raw data coming in.

“You should know that that these stretch-goal observations are risky,” wrote Stern in a post on the mission’s page, “requiring us to know exactly where both Ultima and New Horizons are as they pass one another at over 32,000 mph in the darkness of the Kuiper Belt… But with risk comes reward, and we would rather try than not try to get these, and that is what we will do.”

NASA public relations and other staff are still affected by the federal shutdown, but the New Horizons team will be covering the signal acquisition and first data live anyway; follow the mission on Twitter or check in to the NASA Live stream tomorrow morning at 7 AM Pacific time for the whole program. The schedule and lots of links can be found here.


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Author: Devin Coldewey

MIT researchers are now 3D-printing glass

While the thought of a machine that can squirt out endless ropes of molten glass is a bit frightening, the folks at MIT have just about perfected the process. In a paper published in 3D Printing and Additive Manufacturing, researchers Chikara Inamura, Michael Stern, Daniel Lizardo, Peter Houk and Neri Oxman describe a system for 3D printing glass that offers far more control over the hot material and the final product.

Their system, called G3DP2, “is a new AM platform for molten glass that combines digitally integrated three-zone thermal control system with four-axis motion control system, introducing industrial-scale production capabilities with enhanced production rate and reliability while ensuring product accuracy and repeatability, all previously unattainable for glass.”

The system uses a closed, heated box that holds the melted glass and another thermally controlled box where it prints the object. A moveable plate drops the object lower and lower as it is being printed and the print head moves above it. The system is interesting because it actually produces clear glass structures that can be used for decoration or building. The researchers take special care to control the glass extrusion system to ensure that it cools down and crystallizes without injecting impurities or structural problems.

“In the future, combining the advantages of this AM technology with the multitude of unique material properties of glass such as transparency, strength, and chemical stability, we may start to see new archetypes of multifunctional building blocks,” wrote the creators.


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Author: John Biggs

Queen rockstar unleashes badass space song about mysterious world of Ultima Thule

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Queen rocker Brian May used to beg his parents to stay up late, so he could learn about the stars.

Now six decades later, the guitar legend turned astrophysicist has released an arena rock song composed for both the farthest away object humanity has ever visited — Ultima Thule — and the spacecraft sent to scour this distant world, NASA’s New Horizons probe. 

“This mission is about human curiosity — the need for mankind to go out there and explore what makes the universe tick,” May said Monday at the Johns Hopkins Applied Physics Laboratory in Maryland, site of the New Horizons headquarters. 

“I hope you will enjoy it,” added May, who released the song two minutes after midnight local time, during the first minutes of the 2019. “I hope it’s worthy of this amazing cause.”  Read more…

More about Space, Science, Queen, Brian May, and Ultima Thule


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Author: Mark Kaufman

‘Stranger Things’ rings in the New Year with a Season 3 release date

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Stranger Things is kicking off the New Year in style. 

At the stroke of midnight (East Coast time) on New Year’s Day, Netflix dropped a video announcement for the next season of the series.

The teaser looks like an old Dick Clark’s New Year’s Rockin’ Eve clip, but distortion quickly sets in, and a date is revealed: July 4, 2019.  Read more…

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Author: Angie Han

This ‘Infinity War’ tune was the throwback jam of 2018

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2018 was a year that cried out for a simple, effervescent throwback tune we could use to forget our present troubles. No one could have guessed we’d find it in a movie that was all about the successful eradication of 50 percent of humanity

But that’s exactly what happened this May when Avengers: Infinity War topped the movie charts, and sent a 42-year-old track bouncing up the music charts in its wake. With Infinity War newly available on Netflix as of last week, we’re just a-movin’ and a-groovin’ to it all over again.

The track, of course, is “Rubberband Man” by the Detroit Spinners (full name, please, lest you confuse them with a contemporary British folk group). It’s in the movie for less than 30 seconds, but leaves a hell of an impression — partly because its 1970s bass-twanging  intro perfectly announces the Guardians of the Galaxy, but mostly because Chris Pratt so utterly throws himself into TikTok-like lip syncing.  Read more…

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Author: Chris Taylor