For years we’ve heard the theory that life on earth may have come from space. Here’s a bit more evidence*. Building Blocks of DNA Found in Meteorites from Space.
* This is admittedly several years old, but is news to me.
The components of DNA have now been confirmed to exist in extraterrestrial meteorites, researchers announced.
A different team of scientists also discovered a number of molecules linked with a vital ancient biological process, adding weight to the idea that the earliest forms of life on Earth may have been made up in part from materials delivered to Earth the planet by from space.
Lab experiments showed that chemical reactions of ammonia and cyanide, compounds that are common in space, could generate nucleobases and nucleobase analogs very similar to those found in the carbonaceous chondrites. However, the relative abundances of these molecules between the experiments and the meteorites differed, which might be due to further chemical and thermal influences from space.
This findings reveal that meteorites may have been molecular tool kits, providing the essential building blocks for life on Earth, Cleaves said. [7 Theories on the Origin of Life]