Supernovae are the explosive end stages of massive stars. About 2.6 million years ago, one such supernova lit up Earth’s sky from about 150 light-years away. A few hundred years later, after the new star had long since faded from the sky, cosmic rays from the event finally reached Earth, slamming into our planet. Now, a group of researchers led by Adrian Melott at the University of Kansas believes this cosmic onslaught is linked to a mass extinction of ocean animals roaming Earth’s w ...read more

Monitoring the well-being of Antarctica’s delicate ecosystem just got a little bit easier thanks to a very unlikely source: penguin poop. By analyzing over 40 years of Antarctic images gathered by seven satellites as part of the Landsat program, a NASA-funded team of researchers recently uncovered new details about the lives of Antarctica's Adélie penguins — a species that may help reveal past and future threats to one of the most unspoiled regions in the world ...read more

In Mexico, corn tortillas rule the kitchen. After all, maize began evolving there from a grass called teosinte some 9,000 years ago, eventually becoming a staple consumed around the world. But that spread presents a puzzle. In 5,300-year-old remains of maize from Mexico, genes from the wild relative show that the plant was still only partly domesticated. Yet archaeological evidence shows that a fully domesticated variety was being grown in South America more than 1,000 years before that. ...read more

A medical procedure transferred a key component of Alzheimer’s disease from one person to another, finds a new study published today in the journal Nature. The discovery suggests the seeds of the devastating neurodegenerative disease are transmissible. “It is a new way of thinking about the condition,” John Collinge, a neurologist at the University of College London in the United Kingdom, who led the new research, told reporters during a media briefing. Odd Autopsy Three years ...read more

Launching Virgin Galactic Virgin Galactic has followed through with their ambitious goal to launch their SpaceShipTwo vehicle into space before Christmas. Today, the aerospace company successfully launched four NASA-supported technologies and two brave test pilots aboard the suborbital space plane into space and then landed safely back on Earth. [embed]https://twitter.com/virgingalactic/status/1073246723114381312[/embed] Today, SpaceShipTwo, named the VSS Unity, launched for space, ...read more

The idea of shrinking things down to a more convenient size seems so enticing. It’s a superpower for Ant-Man, kicks off the adventures in Honey I Shrunk the Kids, and, of course, the Simpsons had fun with the idea too. (Shrinkage has come up in other contexts, as well.) Now, in real life, a team of MIT and Harvard scientists has gotten in on the fun by devising a new way of constructing nanomaterials — tiny machines or structures on the order of just a billionth of a meter. The ...read more

By slamming small particles into heavy gold nuclei at nearly the speed of light, scientists have created tiny, ultra-hot droplets of a bizarre type of matter called a quark-gluon plasma (QGP), which once filled the entire universe shortly after the Big Bang. Creating such a 'quark soup' is a tough task in its own right; the first sample of QGP was produced less than two decades ago by smashing two heavy atoms together. But for this new study, which was carried out as part of the& ...read more

Ah, adolescence. A time of change, of navigating awkward social situations, figuring out who you are, maybe holding down that first job or focusing on extracurriculars — all while juggling the demands of school. And for most teens, managing all of this happens on too little sleep. To help alleviate the lack of Z’s, experts in the U.S. have been pushing for school systems across the country to roll back the start times for middle and high school students. Now, a new paper in the jour ...read more

(Inside Science) -- Just a few weeks ago, two large wildfires caused massive destruction and at least 91 deaths in California, the Woolsey fire near Los Angeles and the Camp fire that engulfed the town of Paradise in the north. Residents and firefighters struggled to stop both fires, yet they can expect more like them to come. Simultaneous large fires are becoming more common throughout the continental United States, according to new research presented by Alison Cullen today at the Societ ...read more

Multiple recently discovered specimens of Thylacoleo carnifex have allowed researchers to reconstruct the extinct animal's entire skeleton for the first time, revising what we know about how Australia's largest-ever carnivorous mammal moved. Spoiler alert: It appears that, despite weighing in excess of 200 pounds, the animal was an adept climber. Add that skill to the list of traits, including unique flesh-shearing teeth and a lethal thumb claw, that make Thylacoleo so fascinating. Nickna ...read more