We are star stuff…
Posted in Science, Space on June 15th, 2008
The quote above was made by Carl Sagan. That quote has become even more meaningful recently with the release of a new research study by Zita Martins, Oliver Botta, Marilyn L. Fogel, Mark A. Sephton, Daniel P. Glavin, Jonathan S. Watson, Jason P. Dworkin, Alan W. Schwartz and Pascale Ehrenfreund. The title of the paper is “Extraterrestrial nucleobases in the Murchison meteorite.” Basically, they found uracil and xanthine in a meteorite. These are raw materials for making RNA and DNA that make up us and every living thing on earth.
In their abstract, they say:
Carbon-rich meteorites, carbonaceous chondrites, contain many biologically relevant organic molecules and delivered prebiotic material to the young Earth. We present compound-specific carbon isotope data indicating that measured purine and pyrimidine compounds are indigenous components of the Murchison meteorite. Carbon isotope ratios for uracil and xanthine of ?13C = + 44.5‰ and + 37.7‰, respectively, indicate a non-terrestrial origin for these compounds. These new results demonstrate that organic compounds, which are components of the genetic code in modern biochemistry, were already present in the early solar system and may have played a key role in life’s origin.
I was really excited to hear about this finding and would have loved to read the paper, but alas you have to pay to read it. I really wish more scientists would publish their research under Creative Commons licenses so that more of us interested nonprofessionals could read up on these things. Maybe if more of the results of scientific studies were readily available there would be less fear of science as a sort of mumbo-jumbo voodoo thing to be feared. Oops, that rant is for some other time.
What’s really interesting is that these DNA-RNA precursor materials were found on a meteorite. So, did life evolve totally independently on Earth? Did it have help from a few saturated meteorites crashing into our bubbling cauldron of a cooling planet? Is life a random combination of chemicals that could happen anywhere and so are found just about everywhere including space traveling bits of debris?
Whatever the answers to these question, and I’m sure it will take a lot more research and thinking to come up with answers rather than more questions, it means that we, all of us, are made of star stuff. When we look up to the stars and the milky way and the constellations, we now know that we are part of the solar system, our galaxy, and the universe. We are not alone; we are part of the starry heavens.


Today it was 101 without the heat index. The weather stations said it wouldn’t cool off until 8 PM. We walked down to the mailbox about 4PM and it was really hot. But at 8:30 PM, temperature 95 degrees, we went out and watered all the plants. Finished prepping the lavender slice of the herb garden. While Paul pulled weeds in some of the perennial planters, I managed to plant the 3 rosemary plants and the 4 lavender plants.
Today was hot — 98 degrees (107 with heat index). Tomorrow is supposed to be hotter. But this evening it was another thunder, lightning, and rain storm. I’m hoping if dries off so we can get some yard work done tomorrow. We were supposed to run errands today but it took 6 hours at the tire place to get a replacement tire and wheel alignment. That blew a day. Paul went alone and I got to stay home and catch up on some of the work I didn’t get done during week because of headaches and missing spoons. Guess what, you can almost see the dining room table again.

Hyperion here. I didn’t tell Gayle at the time, since I didn’t want her to worry, but the bulletin we received said that a line of thunderstorms was approaching at 60 miles per hour. It looked likely to spawn tornados as well, so either get out of the way, or get to a shelter. Since it was heading west to east, and I live east of work, I decided to bug out before the storm hit and out run it if I could. In the five minutes it took me to shut things down and get to the parking garage, the weather went from cloudy, but still, to black clouds, high wind, and torrential rains. The power also started flickering in the building. I was suppose to go to the recycling center and the post office on the way home, but decided I preferred staying alive. I skedaddled home as quickly as I could and did manage to stay ahead of the worst of it. Still, it knocked a lot of tree limbs down onto the road, and even a couple of whole trees. Traffic lights were also out for the last 20 miles of the trip. Miraculously, the other drivers actually slowed down and behave rationally, so other than having to swerve around debris in the road, the trip wasn’t actually that bad. After that we had a nice late afternoon reading by oil lamp and wind-up lanterns, and now the powers back (obviously) and the rain has settled down to a nice relaxing hiss outside.