The 170m-year-old ginkgo tree has been used as a medicinal herb

Peter Dowdall discovers a garden tree that has not only survived the bombing of Hiroshima, but has been around for over 170m years.

The Milky Way in which we live, is 13-and-a half billion years old and Nasa reckons that it measures over 100,000 light years in diameter.

I don’t even understand how that measurement makes sense, let alone begin to comprehend the size of it. Suffice to say, it’s vast.