Related topics: climate change

New models shed light on life's origin

The first signs of life emerged on Earth in the form of microbes about four billion years ago. While scientists are still determining exactly when and how these microbes appeared, it's clear that the emergence of life is ...

Space dust as Earth's sun shield

On a cold winter day, the warmth of the sun is welcome. Yet as humanity emits more and more greenhouse gases, the Earth's atmosphere traps more and more of the sun's energy and steadily increases the Earth's temperature. ...

Scientists unveil a unified theory for rocky planet formation

A new theory for how rocky planets form could explain the origin of so-called "super-Earths"—a class of exoplanets a few times more massive than Earth that are the most abundant type of planet in the galaxy.

NASA missions find 'jetlets' could power the solar wind

Scientists with NASA's Parker Solar Probe mission have uncovered significant new clues about the origins of the solar wind—a continual stream of charged particles released from the Sun that fills the solar system.

Five space exploration missions to look out for in 2023

It's been an eventful year for space exploration, with successes including the completion of Nasa's Artemis 1 mission (finally), the inauguration of the James Webb Space Telescope, and the completion of China's Tiangong space ...

Why are most rocks on Earth much younger than the planet itself?

The rocks on Earth are not all the same age. In fact, most are significantly younger than the planet itself. The oldest sections of the oceanic crust are thought to be 200 million years old—a blink of an eye in the planet's ...

CO2 levels in the Northern Hemisphere shape carbon uptake

Carbon dioxide (CO2), one of the major greenhouse gases, doesn't distribute evenly around the globe. Spatial variation of CO2 regulates the climate system and carbon cycle through a physiological effect and radiative forcing.

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