Every year in early January, Earth reaches the closest point in its orbit to the Sun, a moment astronomers call perihelion.

Earth’s spin is not as steady as it looks. As ice melts and groundwater is pumped from deep aquifers to the surface, the planet’s mass is shifting, and with it the position of the rotational axis that ...

Planet Earth is spinning a little faster today — resulting in one of the shortest days of the year. But the change will be so minuscule you won’t even notice. We’re talking even less time than the ...

Aren’t the summer days supposed to be longer and the winter days shorter? Since when have things gone in reverse for the summertime? Since now, maybe? Starting today? Okay, here’s what’s going on.

Researchers find that shifts in Earth’s orbit can trigger abrupt climate changes, even in warm periods without ice sheets.

Earth’s rotation is the continuous spinning of the planet around its axis, an imaginary line running from the North Pole to the South Pole. One full rotation takes about 24 hours, creating the cycle ...

Research suggests that Mars may strongly influence these cycles. For example, Mars helps drive a 2.4‑million‑year cycle ...

Researchers uncover how Mars affects Earth’s orbit, offering new insight into the planetary forces behind ice ages.