Climate 'tipping points' can be positive too—our report sets out how to engineer a domino effect of rapid changes
44 articles from SATURDAY 9.12.2023
Seven tips for ethical shopping this Christmas
A young boy is forced to sit at a dinner table with grown-ups talking endlessly about grown-up stuff. He's bored. He finds it hard at first, to push with his feet against the table frame, tip his chair onto its back legs, and straighten his legs. But towards the pivot point, it becomes an almost effortless, floating experience, requiring only the slightest toe poke now and then.
Lost in space no more: missing tomato found in space station after eight months
As you walk into a shop or go online hunting for Christmas gifts, it can feel pretty daunting. Who needs what, how much will it cost, will they like it? But also very important: am I making a good choice in where I am shopping?
A new (micro) lens on optics: Researchers develop hybrid achromats with high focusing efficiencies
But Nasa and space jocks alike haven’t explained either the mysterious disappearance or reappearance of space-grown fruitIt might have remained one of the greatest mysteries of the universe, destined never to be solved until a freak recent discovery by the crew of the International Space Station (ISS).The subject? A tomato grown from seed in microgravity by US astronaut Francisco “Frank”...
Government and nonprofit workers are getting billions in student loan debt canceled through a public service program
Using 3D printing and porous silicon, researchers at the University of Illinois Urbana-Champaign have developed compact, visible wavelength achromats that are essential for miniaturized and lightweight optics. These high-performance hybrid micro-optics achieve high focusing efficiencies, while minimizing volume and thickness. Further, these microlenses can be constructed into arrays to form larger...
Progress but divides persist as climate summit takes up fossil fuels
The Public Service Loan Forgiveness program, which the George W. Bush administration created in 2007 to encourage people to work for the government and nonprofits, has grown significantly during Joe Biden's presidency. The Conversation asked economist William Chittenden to explain what this student loan program is, who is eligible and what has changed lately.
When is an aurora not an aurora? Phenomena called 'Steve' and 'picket fence' are masquerading as auroras
A UN climate summit in Dubai made progress Saturday but deep divides persisted, negotiators said, following a last-minute push by the OPEC oil cartel to block a phase-out of fossil fuels.
Northern sea otter pup rescued in Alaska finds new home at Shedd Aquarium
The shimmering green, red and purple curtains of the northern and southern lights—the auroras—may be the best-known phenomena lighting up the nighttime sky, but the most mysterious are the mauve and white streaks called Steve and their frequent companion, a glowing green "picket fence."
Coral reefs in peril from record-breaking ocean heat
In late October 2023, a young sea otter pup was found in the remote coastal town of Seldovia, Alaska, stranded and calling out in distress with no mother in sight. After being rehabilitated, fed and healed, the tiny otter—barely over a month old—began a cross-country trip to his new home in Chicago.
Sunak faces new questions at Covid inquiry after pranksters claim they reached his old phone number
Record breaking marine heat waves will cause devastating mass coral bleaching worldwide in the next few years, according to a University of Queensland coral reef scientist.
Current carbon dioxide levels last seen 14 million years ago
PM likely to be asked about WhatsApp messages from pandemic that he says are irretrievable, despite reports number accessedFresh questions are being raised over whether Rishi Sunak has handed over all relevant material to the Covid inquiry after reports that pranksters have been able to access an old phone number he used during his time as chancellor.The prime minister will face a day of...
Saturday Citations: Extragalactic stars in the Milky Way, more biolinguistic evidence and couples coping with COVID
The last time carbon dioxide in the atmosphere consistently matched today's human-driven levels was 14 million years ago, according to a large new study Thursday that paints a grim picture of where Earth's climate is headed.
The longstanding mystery of Mars' moons—and the mission that could solve it
This week we look at migratory stars, communicative children and how to make the best cup of coffee, as well as examining some of the latest COVID advice.
Want to hear the wonder of deep space? This music is made from NASA's telescope data
The two small moons of Mars, Phobos (about 22km in diameter) and Deimos (about 13km in diameter), have been puzzling scientists for decades, with their origin remaining a matter of debate. Some have proposed that they may be made up of residual debris produced from a planet or large asteroid smashing into the surface of Mars (#TeamImpact).
Deforestation hits record low in Brazilian Amazon in November
A Montreal composer has collaborated with NASA to translate scientific data from deep space into...
Deforestation in the Brazilian Amazon hit a record low for the month of November, according to figures released Friday, as President Luiz Inacio Lula da Silva's government touted its environmental record at the UN climate talks.