Tagged: How

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How many early human species existed on Earth?

We Homo sapiens didn’t used to be alone. Long ago, there was a lot more human diversity; Homo sapiens lived alongside an estimated eight now-extinct species of human about 300,000 years ago. As recently as 15,000 years ago, we were...

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How Energy Dissipates Outside Earth’s Magnetic Field

In this visualization, as the supersonic solar wind (yellow haze) flows around the Earth’s magnetic field (blue wavy lines), it forms a highly turbulent boundary layer called the ‘magnetosheath’ (yellow swirling area). A new...