The "Big Bang" may have started the universe but it's likely that littler bangs played a key role in life on Earth, say Albion College physics professor Nicolle Zellner and chemistry professor Vanessa McCaffrey. They (along with former student Jayden Butler, '17) share their fascinating findings on the interspace dispersal of glycolaldehyde (GLA) in an article recently published by the journal Astrobiology.

Their project, funded by NASA and conducted at the Experimental Impact Laboratory at Johnson Space Center, exposed GLA samples to impact pressures between 4.5 and 25 gigapascals-at the low end, forces far greater than the deepest ocean water pressures, or that of a piano dropped from hundreds of miles above the Earth. Albion's team discovered that GLA, a sugar important in the chemistry leading to ribose, can retain its integrity under such intense pressures.

"Experiments that simulate impacts have shown time and time again that biomolecules found on comets, asteroids, and meteorites are not completely destroyed," says Zellner. "The fact that GLA can remain intact under these kinds of pressures provides another piece of the puzzle in our understanding of how biomolecules survived impact delivery to an early Earth."

In addition to the GLA remaining unchanged throughout such intense conditions, McCaffrey noted that several new molecules were seen after impact and that some of these could have important biological implications.

Zellner notes that the Albion work predates recent observations by astronomers, who reported that GLA is present on several comets. These findings support the Albion team's assertion that GLA was likely dispersed throughout the solar system - and onto Earth - via comet impacts.

The project findings, says Zellner, add an important piece to the picture of how life began.

"Everybody assumed GLA was a starting molecule for ribose or amino acids, but little consideration was given as to its source," Zellner says. "We're showing what the source of that molecule could be."

Research Report: "Cometary Glycolaldehyde as a Source of Pre-RNA Molecules"

Related Links
by Jake Weber
Lands Beyond Beyond - extra solar planets - news and science
Life Beyond Earth

Tweet

Thanks for being here; We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain. With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords. Our news coverage takes time and effort to publish 365 days a year. If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.
SpaceDaily Contributor $5 Billed Once credit card or paypal		SpaceDaily Monthly Supporter $5 Billed Monthly paypal only

Microbial diversity below seafloor is as rich as on Earth's surface
Kingston RI (SPX) Oct 21, 2020
For the first time, researchers have mapped the biological diversity of marine sediment, one of Earth's largest global biomes. Although marine sediment covers 70% of the Earth's surface, little was known about its global patterns of microbial diversity. A team of researchers from the Japan Agency for Marine-Earth Science and Technology (JAMSTEC), the University of Hyogo, the University of Kochi, the University of Bremen, and the University of Rhode Island delineated the global diversity of microbe ... read more