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Old Apr 27th, 2020, 05:07 PM   #601
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S'more settled science.

New study says universe expanding faster and is younger

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The universe is expanding faster than it used to, meaning it’s about a billion years younger than we thought, a new study by a Nobel Prize winner says. And that’s sending a shudder through the world of physics, making astronomers re-think some of their most basic concepts.

At issue is a number called the Hubble constant, a calculation for how fast the universe is expanding. Some scientists call it the most important number in cosmology, the study of the origin and development of the universe.

Using NASA’s Hubble Space Telescope, Johns Hopkins University astronomer Adam Riess concluded in this week’s Astrophysical Journal that the figure is 9% higher than the previous calculation, which was based on studying leftovers from the Big Bang.
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Old May 10th, 2020, 08:56 PM   #602
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Interesting.

Microbes could survive on planets with all-hydrogen atmospheres

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Microbes can survive and grow in 100% hydrogen atmospheres, suggesting life could potentially evolve on a much broader range of alien worlds than is often considered, a new study has found.
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In the new study, researchers investigated how well two different kinds of microbes grew in the lab in 100% hydrogen: the bacterium E. coli, which lacks a nucleus, and yeast, which has one. Although neither microorganism normally lives in environments dominated by hydrogen, the scientists found both could reproduce, switching from their preferred oxygen-consuming metabolism to less efficient anaerobic processes.
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“Have no respect whatsoever for authority; forget who said it and instead look what he starts with, where he ends up, and ask yourself, is it reasonable?” —Richard Feynman

“Charm and nothing but charm at last grows a little tiresome...It's a relief then to deal with a man who isn't quite so delightful but a little more sincere.” — W. Somerset Maugham
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Old May 19th, 2020, 12:20 PM   #603
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Stone tool from Oregon archaeological site could point to oldest human presence in western U.S. -- science

Quote:
Hear that hammering? It might be the sound of another nail being driven into the coffin of archaeology's "Clovis first" theory.

The theory holds that the oldest cultural tradition in the Americas is that of a prehistoric culture identified from distinct stone tools found near Clovis, New Mexico, in the early 20th century.

However, in the past couple of decades, work at sites such as Monte Verde, Chile, and Oregon's own Paisley Caves has uncovered evidence of human occupation in the Americas that predates the Clovis culture. (While still preliminary and not yet peer-reviewed, some evidence from an archaeological site in Vero Beach, Fla., may suggest humans were present there at least 14,000 years ago.)
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“Have no respect whatsoever for authority; forget who said it and instead look what he starts with, where he ends up, and ask yourself, is it reasonable?” —Richard Feynman

“Charm and nothing but charm at last grows a little tiresome...It's a relief then to deal with a man who isn't quite so delightful but a little more sincere.” — W. Somerset Maugham
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Old Jun 6th, 2020, 04:52 PM   #604
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Science By Jury

Quote:
The RoundUp Method;
Johnson & Johnson has announced that it will stop selling talcum baby powder in the United States and Canada. Why? Because of predatory trial lawyers who enrich themselves by lying about science.

Talcum powder is absorptive, so it’s mainly used to help keep otherwise moist body parts dry. (You can use your imagination here, but this SNL skit provides a hint.) For years, there have been rumblings that talcum powder is linked to ovarian cancer. But just like the fictitious link between hexavalent chromium in drinking water and cancer popularized by the movie Erin Brockovich, the link between talcum powder and cancer is basically anecdotal.

A new review published in January 2020 by JAMA Oncology concluded that “there was not a statistically significant association between use of powder in the genital area and incident ovarian cancer.” Though the report cautions that there still could be a tiny causal effect that is too small to be detected, the sample size was large (more than 250,000 women observed over a total of 3.8 million person-years). This indicates that the conclusion of no causal effect is probably correct.

The UK’s National Health Service (NHS) touted the results on its website, proclaiming, “‘No evidence’ that talcum powder causes ovarian cancer new review finds.” But for reasons that I will never understand, American websites remain wishy-washy. The American Cancer Society, for instance, says that the evidence is “less clear.”
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“Have no respect whatsoever for authority; forget who said it and instead look what he starts with, where he ends up, and ask yourself, is it reasonable?” —Richard Feynman

“Charm and nothing but charm at last grows a little tiresome...It's a relief then to deal with a man who isn't quite so delightful but a little more sincere.” — W. Somerset Maugham
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Old Jun 6th, 2020, 04:54 PM   #605
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An exposed dry waterfall on Mars

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As you can see, this image straddles across the canyon called Osuga Valles, and heads downstream to the east. It also shows a point where the grade of that canyon suddenly drops. If water ever flowed here this place would have been the location of a truly spectacular waterfall.

More likely, these cataracts mark the location where sometime in the past a glacier had flowed down this valley, cutting a path until it broke out into the large and wide dead end area that appears to have no clear outlet. For some reason at this point the downhill grade of this canyon suddenly dropped, with the glacier following that sudden steep drop.
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“Have no respect whatsoever for authority; forget who said it and instead look what he starts with, where he ends up, and ask yourself, is it reasonable?” —Richard Feynman

“Charm and nothing but charm at last grows a little tiresome...It's a relief then to deal with a man who isn't quite so delightful but a little more sincere.” — W. Somerset Maugham
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Old Jul 27th, 2020, 01:55 PM   #606
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Caution: Link to the Commie News Network inside.

There's been noises about this for some time. Interesting to see it come together.

New Evidence Suggests Humans Were In North America 30,000 Years Ago

Quote:
Recent archeological evidence unearthed in a cave in Mexico, as well as a reexamination of several dozen other sites, has led to the startling conclusion that modern humans were in North America up to 30,000 years ago.

That date pushes back the accepted timeline of humans on our continent from about 13-17,000 years ago to at least 30,000 and perhaps as far back as 56,000 years.

The significance of this alteration of the timeline is enormous. It was believed that about 13,000 years ago, the Clovis people migrated across a land bridge from Siberia to the arctic. Humans were able to make that trek because of melting glaciers clearing a path through the ice of the Bering Sea.

But this new evidence suggests that humans found a way around the towering glaciers that blocked their way — perhaps journeying down the Pacific coast.

It’s likely that very few humans were able to make the trip, which is why there is scant evidence of their existence.
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So what happened to these people? They didn’t leave much evidence behind, but burying their dead suggests ritual so they may have had some rudimentary belief in an afterlife. There may not have been a lot of them, which may have doomed them when other, more advanced societies like the Clovis society showed up about 15,000 years ago.

War, interbreeding, and assimilation probably caused them to go extinct, or at least merge with other human groups around at the time.
Wait. Not First Immigrants? War? Assimilation?

That's gonna leave a mark...
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“Have no respect whatsoever for authority; forget who said it and instead look what he starts with, where he ends up, and ask yourself, is it reasonable?” —Richard Feynman

“Charm and nothing but charm at last grows a little tiresome...It's a relief then to deal with a man who isn't quite so delightful but a little more sincere.” — W. Somerset Maugham
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