A giant, gaping hole that opened up in the Sun's atmosphere has been identified as the source of a surprising abundance of a rare isotope of helium. In late October 2023, the Sun was recorded belching ...

This is a preview. Log in through your library . Abstract Background: Anthropogenic nitrogen (N) addition has dramatically increased and significantly affected global nitrogen cycling. The natural ...

Like everything we see in the world, isotopes are a type of atom, the smallest unit of matter that retains all the chemical properties of an element. Isotopes are forms of a chemical element with ...

The debate goes back to the 1950s. “I’ve seen the argument raging my entire career,” says 71-year-old James Kasting, a geoscientist at the Pennsylvania State University. The findings are a big deal, ...