It's amazing what treasures are tucked away in the collections of London's Natural History Museum - some not fully recognised yet even by the curators.

Take the example of two beetles wedged in the grooves of a piece of oak that was dug from a peat bog in the 1970s.

The insects were donated to the London institution by a farmer concerned they might be an invasive species. They weren't, and so were p ...   More Info Less Info