Video Duration 24 minutes 20 seconds
The world’s largest and most advanced space telescope is launched in the first such trip in decades.
Humanity has embarked on another space adventure.
One of the most sophisticated technological systems ever created on Earth is on its way to making history and looking back in it.
The James Webb Space Telescope is the largest and most powerful space observatory to be launched into space.
With a price tag of $10bn, it is also one of the most expensive.
But how will it help us further understand our universe?
Presenter: Hashem Ahelbarra
Avi Loeb – Professor of science at Harvard University and author of Extraterrestrial
Elizabeth Pearson – Astrophysicist and space journalist
Francisco Diego – Senior research fellow in the Department of Physics and Astronomy at University College London
Astronauts at Risk of 'Space Anemia' | Health | thesuburban.com – The Suburban Newspaper
MONDAY, Jan. 17, 2022 (HealthDay News) — Astronauts can develop a condition called space anemia because their bodies destroy more red blood cells than normal when in space, a groundbreaking study shows.
Assessments of 14 astronauts over six months between space missions found that 54% more blood cells were destroyed while they were in space than when they were on Earth, according to findings published Jan. 14 in Nature Medicine.
“Space anemia has consistently been reported when astronauts returned to Earth since the first space missions, but we didn’t know why,” said lead author Dr. Guy Trudel of the Ottawa Hospital Research Institute in Canada. “Our study shows that upon arriving in space, more red blood cells are destroyed, and this continues for the entire duration of the astronauts’ mission.”
Before this study, it was believed that space anemia was due to fluid shifting into an astronaut’s upper body upon arrival in space.
Astronauts lose 10% of the liquid in their blood vessels this way. It was thought that their bodies rapidly destroyed 10% of their red blood cells to restore the balance, and that red blood cell control returned to normal after 10 days in space.
But this study found that red blood cell destruction is a primary effect of being in space, not just the result of fluid shifts.
On Earth, our bodies create and destroy 2 million red blood cells every second. But the astronauts in this study — both male and female — destroyed 3 million every second while in space.
Five of 13 astronauts in the study were clinically anemic when they returned to Earth. One of the 14 did not have blood drawn on landing.
The researchers also found that space anemia is reversible, with red blood cells levels progressively returning to normal three to four months after astronauts returned from space.
“Thankfully, having fewer red blood cells in space isn’t a problem when your body is weightless,” Trudel said in a hospital news release. “But when landing on Earth and potentially on other planets or moons, anemia affecting your energy, endurance and strength can threaten mission objectives. The effects of anemia are only felt once you land, and must deal with gravity again.”
The findings could be prove useful for patients who develop anemia after long illnesses that require bed rest. Bed rest has been shown to cause anemia, but how it does so is unknown.
The mechanism may be like what occurs in space anemia, according to Trudel, who plans to investigate this theory in future research.
The American Academy of Family Physicians has more on anemia.
SOURCE: The Ottawa Hospital, news release, Jan. 14, 2022
Western scientists study meteorite made famous after crashing into B.C. woman's bedroom – CBC.ca
A meteorite that ripped through a roof and landed inches from a B.C. woman’s head is believed to be around 470 million years old, Western researchers say.
Ruth Hamilton of Golden, B.C. was woken abruptly on the night of Oct. 3, when the small charcoal grey rock the size of a melon broke through her ceiling and landed between her floral pillowcases.
After coming to terms with the surreal experience, she lent the rock to Western University’s physics and astronomy department in London, Ont., where researchers are working to map its orbital journey around the sun before it arrived in Hamilton’s bedroom.
“It was very exciting getting it because any time you see a new meteorite, it’s kind of like Christmas Day,” said adjunct professor Phil McCausland, who leads the investigation.
Upon inspection, McCausland found that the meteorite is an L chondrite, one of the most commonly found types of meteorites to fall on Earth.
What’s not so common about Hamilton’s meteorite is where it originates in the sky.
“This rock has a very interesting and unusual orbit,” said McCausland.
“Chondrite meteors are thought with good evidence to have come from the early solar system, but they went through a major asteroid breakup event. So there is a big body in the asteroid belt that broke up about 470 million years ago,” he said.
“From then, a bunch of material has been delivered around the inner solar system, some of it arriving on Earth. And this, prospectively, is one of those pieces.”
McCausland said so far, the orbits of only a handful of L chondrite meteors are known.
“What happens out in space is that the cosmic rays interact with the rock and end up irradiating it, so that it has somewhat activated isotopes that decay over time,” he said. “We can detect what the decay products are that are coming out of this, the gamma rays and so on. And that gives us a handle on the orbital history of the rock.”
Afternoon Drive9:04Meteorite analysis at Western University
He added that researchers are looking to dash cam and surveillance footage, as well as local photographers who captured the fireball event, to reconstruct the rock’s flight path.
Under Canadian law, the meteor is owned by its finder – in this case, Ruth Hamilton. It’s hers to sell, donate, or keep.
Meanwhile, McCausland will ensure a sample is registered with the Meteoritical Society, where it will be available for future scientific research.
How to Take Care of Air Plants – Lifehacker
Despite the classic excuse of not having a “green thumb,” keeping a houseplant alive has more to do with the ability to make and remember to stick to a schedule than being born without a pretend gene that makes you good at gardening. (And if you have a literal green thumb, you may want to have a medical profession look at it.)
But some houseplants are definitely easier to care for than others, and people who travel a lot, or find it difficult to remember to water their plants may want to opt for varieties that are more self-sufficient. And when it comes to being low maintenance, it’s hard to beat air plants. Still, they’re not completely hands-off and do require some occasional care. Here’s what to know.
What is an air plant?
Officially called Tillandsias, there are more than 600 types of air plants. And while they’re native to the southern parts to the United States and through Central and South America, it’s possible to grow air plants indoors in any climate. And yes, they got their name because they don’t need soil to grow.
Air plants are epiphytes, “which means they use their roots to cling onto supports such as tree branches and rocks, similar to the way orchids grow,” according to the Farmer’s Almanac. “Instead of soaking up water and nutrients through their roots, they use trichomes, special scale-like structures on their leaves, to do the job.”
How to take care of an air plant
First of all, never plant an air plant in soil, or put one in a terrarium. Instead, pop them into a cup or bowl or vase, and place them somewhere that gets between four and six hours of filtered natural light each day. Also, make sure the temperature is between the 50s and 90s (which shouldn’t be difficult indoors).
Air plants need to be soaked—not watered in the traditional sense—once every two weeks. To do this, take the plant out of its usual home and submerge it in a bowl of either rainwater or bottled drinking water (softened and/or tap water contains minerals that can harm the air plants) for about an hour.
After its bath, shake the plant out to remove as much of the water as possible (so it doesn’t rot when it goes back into its usual pot or vase). If an air plant’s leaves start turning brown, it means that it needs to be watered more frequently. And if any of the leaves die completely, cut them off with a pair of sharp scissors.
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