A close study of the hunger hormone ghrelin shows that it affects how frequently animals eat; without it, they may forget when they last ate — ScienceDaily

A hormone that influences when and how frequently animals eat also appears to affect memory, USC scientists have found.

The study was published in the journal Current Biology on Sept. 17.

Animals and humans have the hormone ghrelin in their stomachs. Ghrelin tells animals, as well as humans, when they are hungry and helps regulate their metabolism, but scientists have never been certain how exactly it works.

To learn more about how ghrelin influences hunger, metabolism and memory, researchers at the USC Dornsife College of Letters, Arts and Sciences collaborated with international scientists on a study on rats.

They disrupted the ability of the ghrelin hormone to communicate to the vagus nerve, a nerve that signals from the gut to the brain, and then monitored the impact on their feeding and cognitive behaviors.

The rats were not anxious, but they began eating more frequently, said the study’s lead and corresponding

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Nvidia’s New Video-Conferencing Boasts Mind-Blowing Features: Zoom Doesn’t Come Close

If you’re tired of video meetings, squinting at low-quality video with nobody making virtual eye contact, maybe you should be turning to Nvidia and its new AI software, called Maxine.

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Announced in a press release, Nvidia said that the “GPU-Accelerated AI Platform, Nvidia Maxine, enables video-conference providers to vastly improve streaming quality and offer AI-powered features.”

Maxine is a cloud-native platform, which means that the heavy lifting is done on Nvidia’s servers.

Video compression saves bandwidth

Video-compression technology based, as so much of the company’s product claims to be, on AI, means that the video bandwidth consumption is massively reduced. This makes for much smoother video, even with internet speeds that leave much to be desired.

Gaze correction and face alignment

That

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SpaceX’s Tesla roadster made its first close approach with Mars



a close up of a car: "Starman" driving SpaceX CEO Elon Musk's Tesla roadster.


© SpaceX/Getty Images/FILE
“Starman” driving SpaceX CEO Elon Musk’s Tesla roadster.

SpaceX CEO Elon Musk’s Tesla roadster made its first close approach to Mars on Wednesday.

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The roadster, “driven” by a mannequin dubbed “Starman” wearing a spacesuit, was part of a dummy payload attached to the second stage of a SpaceX Falcon Heavy Rocket that launched in 2018.

SpaceX tweeted yesterday that the vehicle made its first close approach with Mars, coming within 5 million miles of the planet.

“It’s a long distance,” Jonathan Dowell, an astronomer at the Harvard-Smithsonian Center for Astrophysics, told CNN. “Mars would appear about 1/10 the diameter of the Moon, so small but not a point.”

Dowell tracked the rocket using NASA’s Jet Propulsion Laboratory Horizons system, which has an accurate trajectory calculated from the Falcon 9’s initial orbit as it left Earth. He says that it is in elliptical orbit around the

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Leaker: HomePod ‘Mini’ Close to Launch, But No Second-Generation HomePod This Year

Apple is expected to unveil a smaller, lower-priced HomePod at its digital-only event next week, which has led to speculation about the possibility of a second-generation ‌HomePod‌ also arriving. This morning, however, serial Apple leaker l0vetodream poured cold water on that idea, claiming there will be no “HomePod2” launching beside the rumored “mini” model this year.


Earlier this year, Apple began allowing employees to purchase up to 10 HomePods at a 50 percent discount, up from the previous limit of two. Some observers had suggested that the larger purchase limit could be part of Apple’s efforts to clear out inventory of the current ‌HomePod‌ ahead of a new model.

Apple may continue to sell the current ‌HomePod‌ alongside the smaller, more affordable version, but it may cut future supply orders for the premium model, which reportedly hasn’t sold very well. Apple has never disclosed ‌HomePod‌ sales, instead grouping the

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What is CRISPR? A close look at the gene editing technology that won the Chemistry Nobel prize

The Royal Swedish Academy of Sciences yesterday awarded the 2020 Nobel Prize in Chemistry to Emmanuelle Charpentier and Jennifer Doudna for their work on CRISPR, a method of genome editing.

A genome is the full set of genetic “instructions” that determine how an organism will develop. Using CRISPR, researchers can cut up DNA in an organism’s genome and edit its sequence.

CRISPR technology is a powerhouse for basic research and is also changing the world we live in. There are thousands of research papers published every year on its various applications.

These include accelerating research into cancers, mental illness, potential animal to human organ transplants, better food production, eliminating malaria-carrying mosquitoes and saving animals from disease.

Charpentier is the director at the Max Planck Institute for Infection Biology in Berlin, Germany and Doudna is a professor at the University of California, Berkeley. Both played a crucial role in demonstrating how

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Slack’s next phase is to close productivity gaps between humans and software

CEO wants to increase integrations so users never have to leave the collaboration platform to get work done.

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At the company’s Frontiers 2020 conference, Slack CEO Stewart Butterfield said his vision for the next iteration of the platform will connect the productivity gaps between humans and software.

Image: Slack

Slack is steering into the idea that there’s no going back to the old way of working and taking on the more challenging element of remote work. The collaboration platform is building new features to make it easier to onboard new employees and work with outside partners.

Stewart Butterfield, CEO and co-founder of Slack, opened the two-day Frontiers conference on Wednesday. He said that the company’s next phase will focus on closing the gaps between productivity software and building new workflows instead of reinventing old ones. He described the familiar task of taking a screenshot of a graph or image from

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New study reveals sheep and beef farms close to being carbon neutral



a group of sheep standing on top of a lush green field: The study found on average around 90 percent of emissions are being absorbed.


© Getty
The study found on average around 90 percent of emissions are being absorbed.





a group of sheep standing on top of a lush green field


© Provided by Newshub


A new study shows New Zealand sheep and beef farms are already offsetting the bulk of their agricultural emissions.

The research – led by Dr Bradley Case at Auckland University of Technology (AUT) – estimates the woody vegetation on sheep and beef farms across the country is offsetting between 63 percent and 118 percent of on-farm agricultural emissions.

If the mid-point of that range is taken, on average around 90 percent of emissions are being absorbed.

Dr Case, who is a senior lecturer in GIS and remote sensing at AUT’s Applied Ecology Department in the School of Science, said the findings showed there was a strong case for farmers to get credit for the sequestration

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Mars set for close approach to Earth Tuesday, and you can see the show

nasamars

Mars will bright and beautiful in the October 2020 night sky.


NASA

Forget Halloween. This October is all about the glory of Mars, as the glimmering red planet puts on a show in the night sky. You can enjoy Mars as a bright point of light all month long, but there are two special dates to mark on your calendar: Oct. 6 when the planet makes a close approach to Earth, and Oct. 13, when it will be in opposition. 

Spotting Mars

Mars has a reputation as the “red” planet, but its color in the night sky is a little more on the Halloween side of the spectrum. It appears as a bright orange-red dot to the naked eye, like a little spot of glittering rust.

Mars’ distinctive color is one clue you’ve found

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Mars set for close approach to Earth this week, and you can see the show

nasamars

Mars will bright and beautiful in the October 2020 night sky.


NASA

Forget Halloween. This October is all about the glory of Mars, as the glimmering red planet puts on a show in the night sky. You can enjoy Mars as a bright point of light all month long, but there are two special dates to mark on your calendar: Oct. 6 when the planet makes a close approach to Earth, and Oct. 13, when it will be in opposition. 

Spotting Mars

Mars has a reputation as the “red” planet, but its color in the night sky is a little more on the Halloween side of the spectrum. It appears as a bright orange-red dot to the naked eye, like a little spot of glittering rust.

Mars’ distinctive color is one clue you’ve found

Read More

Big Tech stocks close out a ‘nightmare’ September

The Apple logo is displayed at the Nasdaq MarketSite just before the opening bell in New York on Thursday, Aug. 25, 2011.

Scott Eells | Bloomberg | Getty Images

September has been a tough month for traders overall, but a perfect storm left Big Tech stocks, a sector that normally leads the market, with losses. 

“It’s been a ‘Nightmare on Elm Street’ month of September for tech investors,” Dan Ives, managing director at Wedbush Securities, told CNBC.

The Nasdaq, which gets about 40% of its value from just a handful of technology stocks, lost more than 5% in September. At the same time, the S&P 500 has dropped nearly 4%. The Dow Jones Industrial Average has lost more than 2% since Sept. 1.

Apple, which had managed to weather the Covid-19 pandemic and posted impressive results in its fiscal third quarter, closed down 10.25% from the closing price on Aug.

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