Earth's Rotation Slowing: When Will Days Be 25 Hours Long?

• Earth's rotation is gradually slowing down by milliseconds per century, leading to longer days over vast periods.
• A 25-hour day is a distant possibility, projected to occur in approximately 200 million years.
• The Moon's gravitational pull, causing tidal friction, is the primary factor in Earth's rotational deceleration.
• Climate change (melting ice redistributing mass) and internal Earth movements also contribute to the slowing.
• Scientists use advanced geodesy techniques, including satellite laser ranging and atomic clocks, to precisely measure these minute changes.

Why It Matters: Earth's days are lengthening due to natural forces, but a 25-hour day is millions of years away and irrelevant to humanity.