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nucleobases

Bennu_mosaic_OSIRIS-REx_(square)
Photo: Bennu, via Wikimedia Commons.

Could This Be the Year’s Most Ridiculous Idea About How Life Originated?

Stories like this always want to tell us how Earth and life are not “special.” It’s an obsession with science writers, and seemingly with the folks at NASA too. Read More ›
sunlight
Photo credit: Thomas Kinto via Unsplash.

Sunlight on the Puzzle of Prebiotic RNA?

In two previous articles, I have argued against the plausibility of generating biologically relevant polymers (proteins, RNA, and DNA) in a prebiotic world. Read More ›
Ryugu
Photo: Asteroid Ryugu, by Stuart Rankin, via Flickr (cropped).

Uracil Discovered on Asteroid Ryugu — What Does It Mean for the Origin of Life?

These Ryugu samples appear to be our first chance to examine which organic compounds may be produced in a prebiotic setting in our solar system. Read More ›
meteorite
Image credit: Frantisek_Krejci, via Pixabay.

An Extraterrestrial Spin on the RNA World

The authors argue that RNA molecules appeared in warm little ponds more than 4.17 billion years ago, transported by “meteorites and interplanetary dust particles." Read More ›
warm little pond

Warm Little Pond? PNAS Paper Admits Difficulties Generating RNA on Prebiotic Earth

“Warm little ponds,” in Darwin's quaint expression, are actually very hostile environments for generating nucleotides. Read More ›

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