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By - Press Release
Category - Attractions In Santa Clarita
Posted By - Hampton Inn Santa Clarita
By - Press Release
Category - Attractions In Santa Clarita
Posted By - Hampton Inn Santa Clarita
Attractions In Santa Clarita |
It seems life may have received a boost from asteroids smashing into the surface of Earth early in its life.
According to a newly published report produced by researchers at the
University of South Florida (USF) and the University of Washington,
life-producing phosphorus may have landed on Earth 3.5 billion years
ago, providing a boost to early life forms.
USF professor Matthew Pasek, who led the study, says the phosphorus,
when released in water, may have over time incorporated themselves into
prebiotic molecules. The phosphorus, which has been found in asteroids,
was likely carried to Earth via comets and meteorites, which released
the element when impacted Earth.
By focusing on the Hadean and Archean eons of early Earth, the
scientists were able to discern that meteorites delivered phosphorus in
minerals currently not seen on the surface of Earth. By examining Earth
core samples from Zimbabwe, Australia, Wyoming, West Virginia, Florida
the team was able to determine the origin of the minerals. According to
researchers, the minerals likely corroded in water, releasing large
amounts of phosphorus in a form only found during Earth’s early
formation. The phosphite would have likely resulted in an adjusting of
the chemistry of Earth’s early oceans, with its chemical signature later
becoming trapped in marine carbonate where it was preserved.
“The importance of this finding is that it provides the missing
ingredient in the origin-of-life recipe: a form of phosphorus that can
be readily incorporated into essential biological molecules,” said Roger
Buick, a co-author of the study.
There are few natural sources of phosphite that are Earth-based. Some
of the examples include lightning strikes, geothermal fluids and
possibly microbial activity under extremely anaerobic condition.
However, none of the Earth-based forms could have produced the
quantities of phosphite needed to be dissolved in early Earth oceans
that gave rise to life, according to researchers.
According to the report, the conditions that led to a boom of life on
Earth no longer exist and the elements delivered by asteroids are few
and far between. Previous research has already confirmed that before the
emergence of DNA-RNA-protein life , the earliest forms of life on
Earth evolved by relying on RNA alone. While the evolution of early life
is fairly well understood, it remained unclear how early RNA–based life
forms synthesized environmental phosphorus, which in its current form
is relatively insoluble and unreactive.
This is not the first study to propose how life may have evolve from
elements delivered to Earth via asteroids and comets. A number of
scientists have examined and noted the abundance of reactive phosphorus
in the form of the mineral schreibersite, a iron–nickel phosphide.
The report is published in the latest edition of the Proceedings of the National Academy of Sciences.