Tag: earth

An ocean inside Earth? Water hundreds of kilometers down

EARTH
The transition zone (TZ) is the name given to the boundary layer that separates the Earth's upper mantle and the lower mantle. It is...

How magnetism could help explain Earth’s formation

EARTH
There are several theories about how the Earth and the Moon were formed, most involving a giant impact. They vary from a model where...

Mapping the chemistry of the Earth’s mantle

EARTH
The Earth's mantle makes up about 85% of the Earth's volume and is made of solid rock. But exactly what rock types is the...

Where did the Earth’s oxygen come from? New study hints at an unexpected source

EARTH
The amount of oxygen in the Earth's atmosphere makes it a habitable planet. Twenty-one percent of the atmosphere consists of this life-giving element. But in...

Geobiologists shine new light on Earth’s first known mass extinction event 550 million years ago

EARTH
A new study by Virginia Tech geobiologists traces the cause of the first known mass extinction of animals to decreased global oxygen availability, leading...

Earth can regulate its own temperature over millennia, new study finds

EARTH
The Earth's climate has undergone some big changes, from global volcanism to planet-cooling ice ages and dramatic shifts in solar radiation. And yet life,...

What is a flash drought? An Earth scientist explains

EARTH
Many people are familiar with flash floods—torrents that develop quickly after heavy rainfall. But there's also such a thing as a flash drought, and...

The Perseverance rover is collecting rock samples from Mars to bring back to Earth

MARS
Hidden in the minerals and textures that make up rocks are clues about how and when they formed and were later altered. These changes...

Researchers discover previously unknown mineralogy of the deep Earth

MINERALS
What is the structure of the Earth? For starters, it consists of several layers: the crust, the upper and lower mantle, and the core....

The largest meteorite impacts on Earth

EARTH
A Curtin-led research team has found asteroid impacts on the Moon millions of years ago coincided precisely with some of the largest meteorite impacts...

Earth’s warming hole not indication of abrupt climate change event, study finds

CLIMATE
A new study from scientists at the University of Miami (UM) Rosenstiel School of Marine, Atmospheric, and Earth Science suggests that the pattern of...

NASA’s Lucy to fly past thousands of objects for Earth gravity assist

ASTRONOMY
Mission engineers will track NASA's Lucy spacecraft nonstop as it prepares to swoop near Earth on Oct. 16 to use this planet's gravity to...
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