started in cold environment
On the contrary to the widely
held belief that life on Earth began in extremely
hot conditions, new research shows that life
on Earth, billions years ago, began in cold
conditions. The findings of the new research
were published by scientists in “Science” magazine.
For several hundred years scientists
have been asserting that life on Earth began
in water. In the early stages of life development,
it was believed that organic matter found in
oceans consolidated into chain molecules.
As chain molecules became more
complex, macromolecules were able to reproduce.
With the help of amino acids, a by-product of
asteroid collisions, protein was formed, which
in turn aided in formation of membranes, and
Scientists still have not agreed
on exact conditions that led to early formation
of life on Earth. There is a frequent reference
to an “ancestor” of a modern ocean, which is
assumed to have been a hot and a steamy lake.
“The previous assumption is incorrect
because early conditions were not hot”, assert
Jeffrey Bada from University of California,
San Diego, and Antonio Lazcano from Mexican
As individual molecules joined,
the process needed more then just standard catalysts,
such as mud and ionic metals. Along with these
catalysts, low temperatures further improve
this process, and this finding was tested and
proven in various labs.
Scientists further believe that,
in certain spots, life began under thick layers
Bada and Lazcano solidify their
theory with more concrete evidence:
DNA, the carrier of genetic information,
and highly sensitive RNA, have a highest survival
rate in low temperatures. This is the reason
why fossilized DNA in the northern areas of
the Earth have been able to survive for up to
100,000 years, while in the warmer areas of
the Earth, their survival span is between 1,000
to 10,000 years.