Scientists browsing a market in Southeast Asia have uncovered a highly unusual 99-million-year-old feathered dinosaur tail encased in amber.
It is rare to find a feather attached to a dinosaur’s body in an amber sample, and it supports the position among researchers that many dinosaurs had feathers rather than scales, like the birds that have descended from them.
The study’s lead author, Lida Xing of the China University of Geosciences in Beijing, found the unusual specimen at an amber market in Myanmar in 2015, and urged the Dexu Institute of Palaeontology to buy the piece after recognizing its potential scientific importance.
The team used a CT scan to peer into the fossil, finding that the long and flexible nature of the tail meant it had to belong to a dinosaur, not a bird.
The tail belonged to a dinosaur called Coelurosaur — a dinosaur about the size of a small bird, from the same theropod group of dinosaurs as Tyrannosaurus rex. Despite the feathers, the dinosaur was not able to fly, providing more evidence for the contention that plumage originally began popping up on animals for reasons other than flight — such as for camouflage or attracting mates.
Amber is fossilized tree sap, and it acts as a kind of resin that can preserve organic matter that would otherwise be lost.
“Amber pieces preserve tiny snapshots of ancient ecosystems, but they record microscopic details, three-dimensional arrangements, and labile tissues that are difficult to study in other settings,” one of the study’s authors, Ryan McKellar of the Royal Saskatchewan Museum in Canada, said in a news release. “This is a new source of information that is worth researching with intensity and protecting as a fossil resource.”
A prototype of what could be the next generation of space stations is currently in orbit around the Earth.
The prototype is unusual. Instead of arriving in space fully assembled, it was folded up and then expanded to its full size once in orbit.
Expandable modules allow NASA to pack a large volume into a smaller space for launch. They’re not made of metal, but instead use tough materials like the Kevlar found in bulletproof vests.
The station crew used air pressure to unfold and expand the BEAM, but it’s wrong to think about BEAM as expanding like a balloon that could go “pop” if something punctured it.
NASA’s Jason Crusan says there is a better analogy: “It’s much like the tire of your car.”
Even with no air in it, a tire retains its tirelike shape.
When BEAM unfolded in orbit, it adopted its more natural shape, something resembling a stumpy watermelon. Even if it was to lose all its internal air, “it still has structure to it,” says Crusan.
Of course NASA would prefer BEAM not lose all its air, so there are many layers of shielding to prevent things like meteorites or other space debris from poking a hole in BEAM.
“We do believe we’ve taken at least one hit,” says Crusan. “Very small in nature, and actually we can’t even visually see where it’s at.”
Crusan says there was no loss of pressure from the hit.
NASA isn’t actually using BEAM for anything. It’s there just to see how it behaves in space. But Crusan says the space station crew does go inside every once in a while to check sensors inside the module. He says crew members seem to like visiting BEAM.
“We’ve actually had up to six crew members at a time inside of it. It’s about 15 to 16 cubic meters inside,” says Crusan. That translates to something like the interior space of a modest-sized school bus.
The original plan was to detach BEAM after two years and let it burn up as it re-enters Earth’s atmosphere. But there has been a change.
“Because of its performance and it’s doing extremely well, there’s really no reason to throw it away,” says Crusan.
Since storage is at a premium aboard the space station, NASA now plans to use BEAM as a kind of storage shed and to keep it in space as long as the station continues to operate.
The company that made BEAM, Bigelow Aerospace, has big plans for expandable modules, including a stand-alone space station called the B330. The B330 will be 20 times larger than BEAM. But company president Robert Bigelow remains cautious despite the good performance of BEAM.
“No, I worry too much,” says Bigelow. The B330 is much, much more complex than BEAM.
“It has two propulsion systems,” he says. “It has very large solar arrays, a full suite of environmental life-support systems.”
These are all things that have to work flawlessly in order to keep a crew alive and happy in space.
“That’s why I walk around perpetually with a frown. It’s just because there’s so much to think about and be concerned about,” says Bigelow.
Despite his concerns, Bigelow says his new space stations may be in orbit before too long. His company plans to have two B330s ready for launch in 2020.
“It’s very real, and it as a lot to do with dosage,” confirms Dustin Sulak, DO, a medical cannabis expert based in Maine. So, smoking a little too much can absolutely make your morning miserable.
Plenty of people who use cannabis, either recreationally or medically, approach it with a “more is better” mentality. In truth, “most people will get relief from symptoms at a dose that’s lower than what would cause intoxication,” Dr. Sulak says. So, if you’re using marijuana to treat a health issue, you don’t necessarily need to feel high to get the benefits. And even if you’re using it specifically to enjoy a high, there’s no real need to go ham — you’ll probably be better off the next day if you, well, chill a little bit.
Any time you’re consuming cannabis, your body’s cannabinoid receptors are being activated and, essentially, overstimulated. To counteract that, the receptors are pulled into the cells and become inactive, Dr. Sulak explains. But that doesn’t just make them inactive to the THC you’re inhaling, it also means the endocannabinoid compounds that naturally occur in your body aren’t going to be able to bind to those receptors, either.
Under normal circumstances, your body can balance this out, and there’s no real harm. But, if you ingest enough, you could wake up in a state of cannabinoid withdrawal, Dr. Sulak says. “By using a high dose late in the night, what we’re left with is a feeling of deficiency.” That, combined with weed’s well-documented dehydrating effects, can make you an extremely unhappy camper the next day.
What can you do about it? Treating a weed hangover is a lot like treating a normal one, it turns out. Your first priority is going to be getting rehydrated. After that, you can either wait your symptoms out or, if your life circumstances allow, consume a small dose of cannabis to counteract your withdrawal symptoms. On the other hand, if you wake up and still feel a bit intoxicated, Dr. Sulak suggests taking a some CBD or consuming a high-CBD cannabis strain to counteract the effects.
Beyond that, though, it’s worth taking a good look at your long-term cannabis habits. “If you’re having a weed hangover, it’s a sign you’re not using cannabis optimally,” Dr. Sulak says. So, he recommends new users try using a dose that produces the most minimal (yet noticeable) effects for about three days before upping their consumption. And, for veteran users, he suggests abstaining from weed for two days before finding their minimal dose. Both of these protocols help your body build up a tolerance to the negative side effects of marijuana while also making you more sensitive to the positive effects, Dr. Sulak explains.
“It’s a very forgiving and sustainable medicine,” he says. So it’s worth taking the time to find the way to use it that works the best for you — without feeling like crap the next day.
no way are we encouraging illegal activity and would like to remind its readers that marijuana usage continues to be an offense under Federal Law, regardless of state marijuana laws.
Here’s what it would take to survive this particular doomsday prophecy
By Pallab Ghosh
Prof Hawking says: “If humanity is to continue for another million years, our future lies in boldly going where no one else has gone before.”
Prof Stephen Hawking has called for leading nations to send astronauts to the Moon by 2020.
They should also aim to build a lunar base in 30 years’ time and send people to Mars by 2025.
Prof Hawking said that the goal would re-ignite the space programme, forge new alliances and give humanity a sense of purpose.
He was speaking at the Starmus Festival celebrating science and the arts, which is being held in Trondheim, Norway.
Spreading out into space will completely change the future of humanity
Prof Stephen Hawking
“Spreading out into space will completely change the future of humanity,” he said.
“I hope it would unite competitive nations in a single goal, to face the common challenge for us all.
“A new and ambitious space programme would excite (young people), and stimulate interest in other areas, such as astrophysics and cosmology”.
Moon LandingsImage copyrightNEIL A. ARMSTRONG
Return of the Moon landings would give humanity “a sense of purpose”.
He addressed the concerns of those arguing that it would be better to spend our money on solving the problems of this planet along with a pointed criticism of US President Donald Trump.
“I am not denying the importance of fighting climate change and global warming, unlike Donald Trump, who may just have taken the most serious, and wrong, decision on climate change this world has seen,” he said.
Prof Hawking explained that human space travel is essential for the future of humanity precisely because the Earth was under threat from climate change as well as diminishing natural resources.
“We are running out of space and the only places to go to are other worlds. It is time to explore other solar systems. Spreading out may be the only thing that saves us from ourselves. I am convinced that humans need to leave Earth,” the Cambridge University theoretical physicist explained.
The head of the European Space Agency (Esa) Jan Woerner has said he envisages the construction of a Moon base to replace the International Space Station in 2024 and is collaborating with Russia to send a probe to assess a potential site. China has set itself the goal of sending an astronaut to the Moon.
Nasa has no plans to return to the Moon, instead focusing its efforts on sending astronauts to Mars by the 2030s. Though if other space agencies begin to collaborate on constructing a lunar base it would be hard to see Nasa not participating.
Prof Hawking said that there was no long-term future for our species staying on Earth: it would either be hit by an asteroid again or eventually engulfed by our own Sun. He added that travelling to distant worlds would “elevate humanity”.
Media captionIn this European Space Agency video Dr James Carpenter describes the landing site
“Whenever we make a great new leap, such as the Moon landings, we bring people and nations together, usher in new discoveries, and new technologies,” he continued.
“To leave Earth demands a concerted global approach, everyone should join in. We need to rekindle the excitement of the early days of space travel in the sixties.”
He said that the colonisation of other planets was no longer science fiction, though he did pay tribute to the genre in his closing remarks.
“If humanity is to continue for another million years, our future lies in boldly going where no one else has gone before.
“I hope for the best. I have to. We have no other option”.