The secret behind how the International Space Station remains in orbit can be traced all the way back to the genius of Sir ...

is famously linked to Sir Isaac Newton’s discovery of the law of gravity. It so goes that this was the place where the great man was inspired by watching one of the apples fall from the tree.

The apple tree - in the grounds of Woolsthorpe ... is where he saw an apple fall in 1666, which led to him discovering gravity. The online auction, which closed on Friday evening, raised £31,410.