Earth's magnetic poles have swapped places many times in the planet's history. Here is what scientists think a reversal would — and would not — do to us.

Every year the Moon moves about 3.8 centimetres farther from Earth. The reason is tied to the tides — and it is quietly making our days longer.

Around 2010 the molten outer core beneath the Pacific unexpectedly flipped its flow from west to east. ESA satellite data shows the shift has been fading since 2020 — and the cause is still a mystery.