and water vapor in TOI-270 d's atmosphere. These findings, published in The Astrophysical Journal, challenge the Hycean planet hypothesis, instead suggesting a super-Earth model with a surface ...

So if the meteorite has its own source of hydrogen, then early Earth likely did, too—meaning it could have produced water without the help of foreign emissaries. “A fundamental question for ...

Earth may have had water from the beginning Earth shares a chemical composition with anhydrous rocky bodies known as enstatite chondrites. For years, scientists believed water must have come from ...

In this communication, attention is directed to some problems and consequences of the chondritic Earth model. A fuller discussion, for a total of forty-four elements, will be presented elsewhere 2.

Comets that have hit Earth have been ... about 20 years for the model's atmosphere to return to an approximate steady state. The comet changed the atmosphere's water content, with most of the ...

IBM and the European Space Agency (ESA) today launched TerraMind, a new open-source AI model with an “intuitive” understanding of Earth ... cover when mapping water bodies,” said Johannes ...