Aussie share market tipped for weak open
The Australian share market is poised to dip once trading opens, following the US military strike in Iraq and weak US manufacturing data. The Australian share market is set to edge lower following renewed tensions in the Middle East and a contraction in US manufacturing which caused Wall Street's major indexes to fall.The SPI200 futures contract was down four points, or 0.06 per cent, at 6,655.0 at 0800 AEDT, suggesting a slight decline for the benchmark ASX/200 at Monday's open.The ASX closed higher on Friday, up 42.9 points or 0.
Tardigrades are microscopic animals blessed with two very cool nicknames — the water bear and the moss piglet. Water bears are as indestructible as they are tiny. Scientists even tried to rid the planet of tardigrades (only in theory) by putting the creatures through a series of tests that mimicked
Their results show that tardigrades have evolved a unique arsenal of strategies to cope with stressful conditions, including a protein that protects its DNA from Tardigrades are strangely adorable microscopic creatures that are capable of withstanding some of the worst that nature can throw at them.
Tardigrades are tough little critters. When conditions get nasty, they can dry out, reconfigure their bodies and enter suspended animation - called dessication - for years. You can throw virtually anything at them:, zero oxygen, high pressures, , , and even being boiled.
But new research has shown these tiny organisms may have a weakness - long-term exposure to high temperatures, even in their dessicated state. The longer the temperatures are maintained, the lower the tardigrades' chances of survival.
The research shows, its authors said, the importance of understanding the impact ofwrought by anthropogenic climate change on all our planet's creatures.
A meteor that struck Australia brought indestructible stardust more ancient than the sun. It's the oldest solid material ever found on Earth.
In 1969, a 4.6-billion-year-old meteorite struck Murchison, Australia. The meteorite contained fragments of stardust called presolar grains. This stardust is between between 5 billion and 7 billion years old - older than the sun and our solar system. Most of the grains in the Murchison meteorite came from various stars that formed around the same time. This suggests stars are born in bursts, rather than at a constant rate. Visit Business Insider's homepage for more stories. Meteorite fragments found in Australia appear to have brought rare, interstellar passengers to Earth: pieces of stardust older than the sun.
Tardigrades are often found on lichens and mosses. Tardigrades are considered cosmopolitan and can be located in regions all over the world. Tardigrades are one of the few groups of species that are capable of suspending their metabolism (see cryptobiosis).
Scientists keep learning about tardigrades and their remarkable ability to survive just about In the future, after our extinction, if aliens were to land on the moon and find the archive, they could learn It’s important to note: Tardigrades are basically indestructible only when they enter a special state
Around the world, warming isboth and . Some species are expected to weather the changes better than others; , for example, are .
, the microscopic invertebrate creatures also known as water bears or moss piglets, are among the hardiest animals known. There are around 1,300 known species, most of which are between 0.3 and 0.5 millimetres in length.
They live, both marine and freshwater sediments, in mosses and algaes, leaf litter and mud volcanoes, from the equator to the poles. They have tubby little barrel bodies, with eight stumpy little legs, and they look sort of more clumsy and adorable than anything.
To remain active, tardigrades need to be surrounded by a film of water. When they need to hibernate, they retract their head and legs, and almost completely dry out, a shape known as a 'tun' (named after the).
Has Hubble Detected Rogue Clumps Of Dark Matter?
Scientists using the Hubble Space Telescope have discovered evidence of small clumps of dark matter warping the light from distant quasars. Regular matter seems to form only a small part of the universe—much more of the matter seems to be “dark” stuff that influences regular matter via gravity but can’t be detected directly. The most widely accepted theory to explain dark matter suggests that it is a slow-moving particle that can form clumps in the universe. New Hubble observations provide evidence of the smallest clumps yet, which will hopefully further guide scientists’ search for the mysterious material.
They're basically just heads. (Image credit: Shutterstock). Tardigrades are often found living in moss and lichens, and the new species turned up in a moss sample Recently, scientists discovered that a certain type of protein that is unique to tardigrades may be the secret to their recovery prowess.
Their results show that tardigrades have evolved a unique arsenal of strategies to cope with stressful conditions, including a protein that protects its DNA from radiation damage. Scientists are understandably curious about tardigrades ; research into these ancient creatures could tell us
So effective is their extreme hibernation, tardigrades have survived five mass extinctions over Earth's history; andfound that the only way to wipe them out would be to boil away Earth's oceans (which will happen one day, but not, hopefully, for another billion years or so).
But climate change could give these enigmatic creatures a hard time.found a species of Antarctic tardigrade, , could be at risk of extinction due to climate change. Now a second species, , has demonstrated a similar weakness.
"The specimens used in this study were obtained from roof gutters of a house located in Nivå, Denmark,"of the University of Copenhagen in Denmark.
"We evaluated the effect of exposures to high temperature in active and desiccated tardigrades, and we also investigated the effect of a brief acclimation period on active animals."
Scientists found a new way to get 'forever chemicals' linked to cancer out of our water. They're in the bloodstreams of 99% of Americans.
Researchers at Clarkson University are working with the US Air Force to remove a group of "forever chemicals" from water. The chemicals, known as PFAS, have been associated with cancer, liver damage, and developmental issues. They're found in food packaging, cookware, outdoor gear, and firefighting foam. The researchers found a way to zap the chemicals in a plasma reactor, effectively destroying the bond that allows them to stay in the body for life. Visit BusinessInsider.com for more stories. More than 70 years ago, a group of chemicals known as PFAS promised to make people's lives easier and more efficient.
When scientists at the American Museum of Natural History mounted an exhibit about creatures He was talking about tardigrades , tiny creatures that live just about everywhere: in Once an object of interest only among zoological specialists, tardigrades now are generating widespread enthusiasm.
A team of scientists in the United Kingdom and Japan sequenced one tardigrade species’ genome and compared it to another to unlock the animal’s secrets, including the genetic basis of its survival skills. Water bears, known to scientists as tardigrades , are famously adorable microscopic creatures who…
For active tardigrades that had not been acclimated to higher temperatures, the population hit a 50 percent mortality rate after spending 24 hours in just 37.1 degrees Celsius (98 degrees Fahrenheit; they'd probably be in a bit of a pickle).
A brief acclimation period of two hours at 30°C, followed by two hours at 35°C, raised this mortality threshold to 37.6°C. So acclimation does seem to improve the survival rate.
Dessicated tardigrades were able to withstand much higher temperatures; a 50 percent mortality rate after 24 hours was observed at 63.1°C (145°F), and additional experiments revealed the creatures will die far more quickly when temperatures are cranked even higher.
Previously,that dessicated tardigrades could survive temperatures up to 151°C (300°F) for up to half an hour. What this new study demonstrates is that the overall tardigrade survival rate drops off steeply the longer the temperature is maintained at unhealthy heights.
"From this study, we can conclude that active tardigrades are vulnerable to high temperatures, though it seems that these critters would be able to acclimatise to increasing temperatures in their natural habitat,".
"Desiccated tardigrades are much more resilient and can endure temperatures much higher than those endured by active tardigrades. However, exposure-time is clearly a limiting factor that constrains their tolerance to high temperatures."
The research has been published in.
A rare chemical that helped DNA form may have come to Earth on comets from newborn stars, astronomers find .
Phosphorus is key in forming DNA and giving rise to life on Earth, but the element is rare in the universe. Scientists don't know how Earth got its phosphorus, but scientists just found phosphorus-carrying molecules forming around newborn stars. Researchers found the same molecules on a comet orbiting Jupiter. A new study suggests that comets from newborn stars may have delivered the life-giving element to Earth in the form of phosphorus monoxide. Visit Business Insider's homepage for more stories.