In 1862, when Charles Darwin was sent a specimen of orchid from Madagascar with its incredible nectar tube measuring a full 30 centimetres long, he exclaimed in a letter to a friend: 'Good heavens, what insect can suck it!'

A pair of Ukrainian researchers say the mysterious structure is far older than the accepted claim that it was built during the reign of the Pharaoh Khafre between 2558-2532 BC. Manichev Vjacheslav I. and Alexander G. Parkhomenko say evidence of water erosion at the monuments of the Giza Plateau shows the monument was partially flooded.