"Researchers: Comet Collided with Earth 55.6 Million " Topic

…Years Ago

"In recent years, the warm period — known as the Paleocene-Eocene Thermal Maximum (PETM) — has become a major point of interest for researchers as it's perhaps the best past analog to today's human-induced climate change.

Atmospheric carbon dioxide increased rapidly during this warming event, and an accompanying spike in global temperatures of about 5 to 8 degrees Celsius lasted for approximately 150,000 years.

Among the suggested drivers are the intrusion of flood basalts into carbon-rich marine sediments, carbon degassing from volcanoes, and an extraterrestrial impact on Earth.

Sorting through samples of sediment from the time period, Rensselaer Polytechnic Institute geochemist Dr. Morgan Schaller and co-authors discovered evidence of a comet strike in the form of tiny spherical droplets of glass called microtektites…"
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Amicalement
Armand

And what happened to the corals? The ocean levels? The world at the time was changed into something else, and time wore on, and life continued.

This penchant, even insistence, that the world as-is constitutes some ideal that must be preserved, is fallacious. I take as my example a stunt conducted recently by the Formula E people, who lowered a Formula E car onto Greenland's melting ice sheet and ran it around, doing donuts and whatnot, until the battery was dead (i.e. somewhat near an hour): the driver (can't recall his name) was in wonder at the fragility of the planet, and how the ice was melting and the ice sheet would disappear. Oh, the horror! The last Ice Age is still going away. He seemed to not realize that this is not a bad thing………..

Well. It's pretty well explained in numerous places exactly why losing the ice caps on the Earth is NOT going to be a good thing for humanity.

And that is going to be stopped, how, exactly? Isn't it normal for the ocean levels to be up after an ice age is over? The water has to go somewhere. We ought to accept that warming produces a different kind of climate than that still overlapping the end of an ice age………..

I'm sure there's a big one with our name on it right this second.

I say let it come. Stop interfering with Nature, right? :)

Dan
PS. Man bad. Nature good. Rock Nature. Rock good. :)

Man bad.
Nature good.
Rock Nature.
Rock good.

The graphic movement is not in scale. But that's how facile CGI works: move it fast!

I'm sure there's a big one with our name on it right this second.

Wide-field Infrared Survey Explorer (WISE) – the space telescope that ruled out Jupiter-sized planets up to 26kAU and Saturn-sized planets up to 10kAU – had a primary mission of finding and mapping the vast majority of NEOs including earth crossing asteroids – and found the population wanting.

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PASADENA, Calif. -- New observations by NASA's Wide-field Infrared Survey Explorer, or WISE, show there are significantly fewer near-Earth asteroids in the mid-size range than previously thought. The findings also indicate NASA has found more than 90 percent of the largest near-Earth asteroids, meeting a goal agreed to with Congress in 1998.

Astronomers now estimate there are roughly 19,500 -- not 35,000 -- mid-size near-Earth asteroids. Scientists say this improved understanding of the population may indicate the hazard to Earth could be somewhat less than previously thought. However, the majority of these mid-size asteroids remain to be discovered. More research also is needed to determine if fewer mid-size objects (between 330 and 3,300-feet wide) also mean fewer potentially hazardous asteroids, those that come closest to Earth.

The results come from the most accurate census to date of near-Earth asteroids, the space rocks that orbit within 120 million miles (195 million kilometers) of the sun into Earth's orbital vicinity. WISE observed infrared light from those in the middle to large-size category. The survey project, called NEOWISE, is the asteroid-hunting portion of the WISE mission. Study results appear in the Astrophysical Journal.

@Great War Ace: "The graphic movement is not in scale. But that's how facile CGI works: move it fast!"

Then CGI bad, rock good.

Dan