Sunday , August 1 2021

Tag Archives: particles

Particles give absolute age of asteroid Itokawa

Understanding the origin and time evolution of near-Earth asteroids (NEAs) is an issue of scientific interest and practical importance because they are potentially hazardous to the Earth. However, when and how these NEAs were formed and what they suffered during their lifetime remain enigmas. Japanese scientists, including those from Osaka ... Read More »

Iron-silica particles unlock part of the mystery of Earth’s oxygenation

The oxygenation of Earth’s atmosphere was thanks, in part, to iron and silica particles in ancient seawater, according to a new study by geomicrobiologists at the University of Alberta. But these results solve only part of this ancient mystery. Early organisms called cyanobacteria produced oxygen through oxygenic photosynthesis, resulting in ... Read More »