Scientists re-create what may be life's first spark
WASHINGTON - Scientists in a lab have used a powerful laser to re-create what might have been the original spark of life on Earth.
A study published today in the journal Proceedings of the National Academy of Sciences shows researchers in the Czech Republic used a laser to zap clay and a chemical soup to simulate the energy of a speeding asteroid smashing into the planet. They ended up creating what can be considered crucial pieces of the building blocks of life.
The findings do not prove that this is how life started on Earth about 4 billion years ago, and some experts are unimpressed with the results.
Scientists have been able to make these RNA bases other ways, using chemical mixes and pressure.
An alternative theory of early life on Earth says that microbes arrived here from space aboard a comet or an asteroid - a sort of seed theory of life.