Earth’s Magnetic Heartbeat, a Thinner Past and New Alien Worlds

Space research never stops and it seems neither do the surprises.
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Earth’s Magnetic Heartbeat, a Thinner Past and New Alien Worlds
ESA’s Swarm constellation reveals new rapid changes of our magnetic field, tied directly to the heart of our planet’s molten iron core. ESA/ATG Medialab
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The white dots in this ancient rock from Australia's Beasley River are calcified bubbles that formed from gases released as lava poured onto a younger Earth 2.7 billion years ago. The bigger the bubbles, the lower the pressure of the surrounding air, with the size indicating the Earth had atmosphere only half its current pressure, while a thick atmosphere had been expected. (Sanjoy Som/University of Washington)
The white dots in this ancient rock from Australia's Beasley River are calcified bubbles that formed from gases released as lava poured onto a younger Earth 2.7 billion years ago. The bigger the bubbles, the lower the pressure of the surrounding air, with the size indicating the Earth had atmosphere only half its current pressure, while a thick atmosphere had been expected. Sanjoy Som/University of Washington
Alan Duffy
Alan Duffy
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