Solar wind

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Earth's magnetic field, which protects the planet from harmful blasts of solar radiation, may be 750 million years older than scientists had previously thought.

Earth's magnetic field (aka geomagnetic field) not only determines the location of our planet's North and South poles, it also provides an amazingly powerful protective barrier that defends us from harmful solar winds and radiation.

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Earth's magnetic field extends from pole to pole and is strongly affected by solar wind from the sun. This "wind" is a stream of charged particles constantly ejected from the sun's surface. Occasional sudden flashes of brightness known as solar flares release even more particles into the wind. Sometimes, the flares are followed by coronal mass ejections that send plasma into space.

For the past 150+ years, the big ones have all missed us. But at some point, our good luck will run out.

A new theory is welcome for those who are ready to dismiss dark matter altogether.

Pockets of water have been detected in dust from our solar system – suggesting that life's ingredients may be spread across the universe