The ice core spans at least 1.2 million years of Earth’s climate history. Air bubbles and particles trapped inside the ice could also reveal why the planet’s ice ages suddenly became longer ...
The same team previously drilled a core about 800,000 years old. Analysis of the ancient ice is expected to show how Earth's atmosphere and climate have evolved. It should provide insight into how ...
Earth’s magnetic north is not static. Like an anchorless buoy pushed by ocean waves, the magnetic field is constantly on the move as liquid iron sloshes around in the planet’s outer core.