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Space station sensors saw how weird ‘blue jet’ lightning forms
A mysterious type of lightning in the upper atmosphere has been traced to a brief, bright flash of light at the top of a storm cloud.
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Science! (3 Viewers)
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They remain one of the most elusive groups of humans to have walked on earth. Evidence from the DNA traces left by Denisovans shows they lived on the Tibetan plateau, probably travelled to the Philippines and Laos in south Asia and might have made their way to northern China more than 100,000 years ago. They also interbred with modern humans.
What Denisovans looked like or how they lived has remained a mystery, however. Only a jaw fragment, a few bits of bone and one or two teeth provide any evidence of their physical characteristics.
Their DNA, which was first found in samples from the Denisova cave in Siberia in 2010, provides most of our information about their existence.
But recently scientists have pinpointed a strong candidate for the species to which the Denisovans might have belonged. This is Homo longi – or “Dragon man” – from Harbin in north-east China. This key fossil is made up of an almost complete skull with a braincase as big as a modern human’s and a flat face with delicate cheekbones. Dating suggests it is at least 150,000 years old.
“We now believe that the Denisovans were members of the Homo longi species,” said Prof Xijun Ni of the Chinese Academy of Sciences in Beijing, last week. “The latter is characterised by a broad nose, thick brow ridges over its eyes and large tooth sockets.”
The possible Denisovan-Homo longi link is one of several recent developments by researchers working on these humans with whom Homo sapiens shared the planet for hundreds of thousands of years. It is even thought they could have played a key role in our own evolution…….
www.theguardian.com
What Denisovans looked like or how they lived has remained a mystery, however. Only a jaw fragment, a few bits of bone and one or two teeth provide any evidence of their physical characteristics.
Their DNA, which was first found in samples from the Denisova cave in Siberia in 2010, provides most of our information about their existence.
But recently scientists have pinpointed a strong candidate for the species to which the Denisovans might have belonged. This is Homo longi – or “Dragon man” – from Harbin in north-east China. This key fossil is made up of an almost complete skull with a braincase as big as a modern human’s and a flat face with delicate cheekbones. Dating suggests it is at least 150,000 years old.
“We now believe that the Denisovans were members of the Homo longi species,” said Prof Xijun Ni of the Chinese Academy of Sciences in Beijing, last week. “The latter is characterised by a broad nose, thick brow ridges over its eyes and large tooth sockets.”
The possible Denisovan-Homo longi link is one of several recent developments by researchers working on these humans with whom Homo sapiens shared the planet for hundreds of thousands of years. It is even thought they could have played a key role in our own evolution…….
Scientists link elusive human group to 150,000-year-old Chinese ‘dragon man’
Researchers have found fresh evidence that may connect the mysterious Denisovans to the early human species Homo longi
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Sailorsaint
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Red October anyone?
www.navalnews.com
U.S. Navy Submarine First In World Fitted With Silent Caterpillar Drive - Naval News
Submarines use stealth to dominate the seas, presenting an illusive yet deadly threat. Now U.S. Navy submarines will take stealth to a new level. American submarines will now be fitted with magnetohydrodynamic drive.
www.navalnews.com
Had to check since 4\1...Red October anyone?
U.S. Navy Submarine First In World Fitted With Silent Caterpillar Drive - Naval News
Submarines use stealth to dominate the seas, presenting an illusive yet deadly threat. Now U.S. Navy submarines will take stealth to a new level. American submarines will now be fitted with magnetohydrodynamic drive.
The Magnetohydrodynamic Drive Is Real—and You Can Build One
All you need is a battery, a magnet, and some wires to build your own quasi-fictional submarine drive.
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Are they going to strap laser beams to the wings of the birds?
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Trash from the International Space Station may have hit a house in Florida
NASA collected the item to confirm whether it came from the International Space Station.
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I still think it is a 4/1 joke, the submarine to receive it is the USS Montana...and the entire article reads like the Hunt for Red October. Even the last sentence is "Either way, Montana will remain unseen", imo a tribute on Capt Borodin's last words "I would have liked to have seen Montana".Had to check since 4\1...
The Magnetohydrodynamic Drive Is Real—and You Can Build One
All you need is a battery, a magnet, and some wires to build your own quasi-fictional submarine drive.www.wired.com
NavalNews has a history of April Fools articles.
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Got a coworker ex Navy who agrees. He could find nothing to back out up from the normal Navy announcement routine.
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The White House wants Nasa to figure out how to tell time on the moon.
A memo sent on Tuesday from the head of the US Office of Science and Technology Policy (OSTP) has asked the space agency to work with other US agencies and international agencies to establish a moon-centric time reference system. Nasa has until the end of 2026 to set up what is being called Coordinated Lunar Time (LTC).
It’s not quite a time zone like those on Earth, but an entire frame of time reference for the moon. Because there’s less gravity on the moon, time there moves a tad more quickly – 58.7 microseconds every day – compared with on Earth. Among other things, LTC would provide a time-keeping benchmark for lunar spacecraft and satellites that require extreme precision for their missions.
“An atomic clock on the moon will tick at a different rate than a clock on Earth,” said Kevin Coggins, Nasa’s top communications and navigation official. “It makes sense that when you go to another body, like the moon or Mars, that each one gets its own heartbeat.”…….
www.theguardian.com
A memo sent on Tuesday from the head of the US Office of Science and Technology Policy (OSTP) has asked the space agency to work with other US agencies and international agencies to establish a moon-centric time reference system. Nasa has until the end of 2026 to set up what is being called Coordinated Lunar Time (LTC).
It’s not quite a time zone like those on Earth, but an entire frame of time reference for the moon. Because there’s less gravity on the moon, time there moves a tad more quickly – 58.7 microseconds every day – compared with on Earth. Among other things, LTC would provide a time-keeping benchmark for lunar spacecraft and satellites that require extreme precision for their missions.
“An atomic clock on the moon will tick at a different rate than a clock on Earth,” said Kevin Coggins, Nasa’s top communications and navigation official. “It makes sense that when you go to another body, like the moon or Mars, that each one gets its own heartbeat.”…….
Moon Standard Time? Nasa to create lunar-centric time reference system
Space agency tasked with establishing Coordinated Lunar Time, partly to aid missions requiring extreme precision
saintmdterps
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whatever timekeeping method they use is fine as long as they don’t incorporate daylight savings timeThe White House wants Nasa to figure out how to tell time on the moon.
A memo sent on Tuesday from the head of the US Office of Science and Technology Policy (OSTP) has asked the space agency to work with other US agencies and international agencies to establish a moon-centric time reference system. Nasa has until the end of 2026 to set up what is being called Coordinated Lunar Time (LTC).
It’s not quite a time zone like those on Earth, but an entire frame of time reference for the moon. Because there’s less gravity on the moon, time there moves a tad more quickly – 58.7 microseconds every day – compared with on Earth. Among other things, LTC would provide a time-keeping benchmark for lunar spacecraft and satellites that require extreme precision for their missions.
“An atomic clock on the moon will tick at a different rate than a clock on Earth,” said Kevin Coggins, Nasa’s top communications and navigation official. “It makes sense that when you go to another body, like the moon or Mars, that each one gets its own heartbeat.”…….
Moon Standard Time? Nasa to create lunar-centric time reference system
Space agency tasked with establishing Coordinated Lunar Time, partly to aid missions requiring extreme precision
Honestly that seems like an awful plan.
If you are going to create a new time reference, make it on an common factor for at least the solar system. Otherwise, you have to repeat for every celestial body. That will quickly get confusing and rather unmanageable.
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and call it Space Time
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W
We can't agree on a unit of measurement for this planet.
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