Oldest Milky Way star — A team of Spanish scientists spotted the star J0815+4729 with a pair of telescopes and determined its age based on the amount of heavier elements it contained. The star was born perhaps 300 million years after the Big Bang, or 13.5 billion years ago – that makes it one of the oldest ever spotted.
~ Our Sun, by comparison, is a youthful 4.6 billion years old.
Lots of planets — Researchers at the University of Oklahoma looking at a galaxy 3.8 billion light years away spotted evidence of planets. More specifically, they think there should be at least 2000 objects, ranging from moon- to Jupiter-sized, per main-sequence star in the galaxy, based on how the galaxy’s gravity warped the objects behind it. This is not direct evidence, mind you; no one has spotted any actual planets.
~ But it’s evidence nonetheless.
Satellite comes back to life — A $US150 million NASA satellite which died from systems failure just five years after its launch has somehow reactivated and is still broadcasting. IMAGE was launched in 2000 and declared lost in 2005. It is still transmitting data beyond simple telemetry, indicating that some of its six onboard instruments may still be active. It’s possible the satellite turned back on during a period of time in which Earth’s orbit eclipsed its onboard solar panels, drained its batteries and forced a reset of IMAGE’s systems.
~ Reanimator …
Old NASA films saved by space enthusiast inform new parachute design — They contained the only surviving footage of the August 1972 qualification test for Viking’s parachute, the contraption responsible for safely decelerating the program’s landers through the Martian atmosphere. Because that atmosphere is 99% thinner than Earth’s, Viking’s engineers knew their spacecraft would be plummeting at supersonic speeds as they neared the planet’s surface. The engineers had thus built a novel parachute that could endure such punishing conditions: a 204-square-metre (2200-square-foot) expanse of white polyester with braided nylon suspension lines.
~ Cloth and rope is unpredictable at extremely high speeds in alien atmospheres.
Pocket-sized DNA Reader — A few years back, a company called Oxford Nanopore announced it was developing a radically different way of sequencing DNA. Its approach involved taking single strands of the double helix and stuffing them through a protein pore. With a small bit of current flowing across the pore, the four bases of DNA each created a distinct (if tiny) change in the voltage as it passed through which could be used to read the DNA one base at a time as it wiggled through the pore. It’s still not perfect, but provides unique information.
~ Now they just need to update their software.
White paint fights climate change — What do spraying sulphate aerosols into the atmosphere, fertilising the ocean with iron and building giant mirrors in space have in common? They are all large-scale climate engineering plans aimed at keeping our planet cool. They are also risky, have questionable effectiveness and are likely to alter climate systems in unexpected ways – they could make everything worse, instead of better.
Painting cities white, however, has just been proven to work. In research led by Sonia Seneviratne of ETH Zurich with researchers from UNSW, University of Tasmania, CSIRO and Pacific Northwest National Laboratory in the US, modifications like lightening the colour of buildings, roads and other infrastructure in high population areas reduced temperatures by 2 to 3°C.
~ When we re-roofed, we chose a light colour advisedly.
World’s second largest meat processor invests in lab-grown meat — Tyson Foods, the world’s second largest processor and marketer of chicken, beef, and pork, announced it has invested in Silicon Valley startup Memphis Meats, a company that makes lab-grown meat using animal cells. The investment amount was not disclosed, but it follows a slew of other high-profile backers including Cargill Inc, Bill Gates and Richard Branson.
~ It amuses me that people say ‘yuck’ to this and then you see all the processed foods in their cupboards.
Jawbone recites human migration — Archaeologists in Israel have uncovered the partial jawbone from what appears to be a modern human. Dated to between 175,000 to 200,000 years old, the fossil is 50,000 years older than any other human fossil found in the region, suggesting humans left Africa far earlier than previously thought.
The fossil was found in Israel’s Misilya Cave, one of several prehistoric cave sites on Mount Carmel. Multiple dating techniques put its age at between 175,000 to 200,000 years old: the fossil resets the date for when modern humans (Homo sapiens) first left Africa, leaving their continent of origin for the Middle East.
3.5 Billion-year-old fossils challenge ideas about earth’s start — In the arid, sun-soaked northwest corner of Australia, along the Tropic of Capricorn, the oldest face of Earth is exposed to the sky. Drive through the northern outback for a while, south of Port Hedlund on the coast, and you will come upon hills softened by time. They are part of a region called the Pilbara Craton, which formed about 3.5 billion years ago, when Earth was in its youth. According to John Valley, a geochemist at the University of Wisconsin, the fossils imply that life diversified remarkably early after the planet’s tumultuous beginning.
~ The fossils add to a wave of discoveries that point to a new story of ancient Earth.