September 18, 2024

1 proton per 4 cubic meters...

"More than 95% of the energy density in the universe is in a form that has never been directly detected in the laboratory! The actual density of atoms is equivalent to roughly 1 proton per 4 cubic meters."

Source: WMAP- Content of the Universe - NASA https://wmap.gsfc.nasa.gov/universe/uni_matter.html

Image - CMB Timeline300 no WMAP.jpg

Be grateful for the complex life on Earth...