Each week we uncover the most interesting and informative articles from around the world, here are 10 of the coolest stories in science this week.
Lasers and Cow Eyes
Ordinary contact lenses just moved one step closer to letting you shoot lasers from your eyes.
But don't worry — nobody's building battalions of bovines that can blast beams from their eyes. [Read more about the eyeballs.]
North Korea conducted its latest nuclear test at Punggye-ri on Sept. 3, and it was the most massive one yet, registering on sensors as a 6.3-magnitude earthquake. Around 8 minutes later, geologists detected a smaller rumbling of 4.1 magnitude that got scientists speculating: Could the nuclear test site, hidden inside a mountain, have collapsed? [Read more about the trial.]
A Novel Process
Army Pvt. Shamika Burrage's left ear is unlike other ears, though you might not realize it at first. Like her right ear, it is made from Burrage's own cells, and connected to her head by her own blood vessels. She can hear perfectly well out of it, and feel perfectly well when you touch it. And yet, until a few days ago, Burrage's left ear was not on her head — it was on her arm. [Read more about the procedure.]
A Distant, Dangerous Cousin
It's related to HIV, yet you've probably never heard of it: a virus called human T-cell leukemia virus type 1, or HTLV-1.
But what exactly is HTLV-1, and how is it different from HIV? [Read more about the virus.]
Proving Einstein Wrong
A groundbreaking quantum experiment recently confirmed the reality of "spooky action-at-a-distance" — the bizarre phenomenon that Einstein hated — in which linked particles seemingly communicate faster than the speed of light. [Read more about the test.]
You can run from Boston Dynamics' humanoid robot Atlas, but it wouldn't do you any good — the robot can run after you.
This isn't the first time that Atlas' antics have gone viral. Atlas appeared in a video compilation posted to YouTube on Feb. 23, 2016, that showed the robot walking flat-footed through a snow-covered forest, stacking boxes on shelves and recovering its balance after a Boston Dynamics employee pushed the bot with a hockey stick. [Read more about the robot.]
Getting a Date
It's Elon Musk at his Elon Musk-iest: According to news reports, the space-and-electric-car entrepreneur met his current girlfriend by making a joke about treacherous artificial intelligence. [Read more about the experiment.]
Odd and Terrible
One of the leading killers of Australia's endearing koalas is a debilitating bacterial infection: chlamydia. [Read more about the situation.]
To Bae or Not to Bae?
That is the question of dating. And while you might believe the answer hinges mostly on "chemistry" or mutual interests, a team of psychology researchers from McGill University in Montreal suggests that there's an unlikely judge ultimately making the call: your behavioral immune system.
In the study, Sawada and her colleagues recruited several hundred people ages 18 to 35, who were single and heterosexual, to participate in either an in-person or online speed-dating experiment. [Read more about the culprit.]
During the last ice age, a small horse about the size of a Shetland pony somehow trampled into a big lake. It's unclear how the animal died, but its body fell to the bottom of the lake, where it lay buried for about 16,000 years — that is, until this past fall, when landscapers in Utah unexpectedly unearthed the horse's remains in their backyard.
Though the horse's death will remain a mystery, researchers are excited to study its remains. [Read more about remains.]