Unexplained

The first recorded observation of the Black Knight was in 1899, when Nikola Tesla, a Serbian-American inventor and electrical enginee

Observers have been treated to a breathtaking display as the two planets appear to converge in the sunset direction during evening twilight.

The researchers worked with two mammoth specimens from different eras and parts of Russia, one nearly 45,000 years old and the other just 4,300 years old.