14/09/2026
Did you know the Moon has two totally different sides?
The Moon's near side is covered in dark volcanic plains. Its far side is ancient, rugged highlands with a much thicker crust. Scientists have debated why for decades, and new samples from China's Chang'e-6 mission, the first ever collected from the far side, may finally explain it.
Researchers compared far-side rock samples to near-side samples from Apollo and earlier Chinese missions. The mantle beneath both sides turned out to be surprisingly similar. But the crust told a very different story.
Their theory: once the Moon became tidally locked to Earth, the near side experienced stronger heating than the far side. This uneven heat created a temperature imbalance powerful enough to drive magma sideways, pushing early, magnesium-rich material toward the far side, while leaving richer, potassium-heavy material on the near side.
Over time, that one-directional flow may have built the Moon's dramatically lopsided crust, explaining a mystery scientists have puzzled over for 60 years.