Could the sugar in our bodies have first come from space?
Recent laboratory simulations suggest that the fundamental sugar molecules necessary for life may have originated in deep space before traveling to Earth via comets or meteorites. Researchers have demonstrated that complex sugars can form on interstellar ice grains when exposed to cosmic ultraviolet
New research indicates that ribose and other essential sugars could have formed in the icy environments of interstellar space. Scientists used laboratory vacuum chambers to replicate the frigid conditions of a molecular cloud, exposing simulated space ice to UV light to trigger chemical reactions.
The study found that these conditions naturally produce a wide variety of sugar molecules, including those that form the structural backbone of RNA. This suggests that the chemical building blocks of life are not exclusive to Earth but may be widespread throughout the galaxy.
If these sugars were indeed present in the early solar system, they could have been delivered to our planet's surface during the heavy bombardment period by celestial bodies. This discovery provides a potential answer to how the complex precursors of biology first emerged in prebiotic environments.
Source: NASA Ames Research Center.
