particles

Aerosol particles below 3 nm which can reach sizes having climatic impacts, formed frequently in urban locations in India

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Aerosol particles

Scientists tracing the concentration, size and evolution of aerosol particles smaller than 3 nanometres at an urban location in India have found frequent formation of sub-3nm aerosol particles in the atmosphere. This has critical importance as a major fraction of these newly formed particles can reach to sizes of cloud condensation nuclei where they have … Read more

Particles give absolute age of asteroid Itokawa

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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 University, closely examined particles collected … Read more

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

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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 the oxygenation of Earth’s atmosphere. … Read more

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