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A strange "gel-like" substance has been found on the far side of the Moon by China's lunar rover Yutu-2.

Found at the bottom of a small crater, the gel is reported to have fascinating colours and a mysterious glow.

The rover - which was launched as part of the Chang'e 4 mission - has been on the Moon since January, from where it has been sending photos back to Earth for the past 18 weeks.

The explorer has already found that the composition of the Moon's surface is different to what scientists expected.

Now, it has made another interesting discovery.

China is yet to share images of the material but one theory is that it is an impactite, which is basically a substance that is formed when meteors hit an object in space.