Dutch researchers have won two Ig Nobel prizes this year, an ‘improbable research’ award which ‘honours achievements that first make people laugh, and then make them think’.

The psychology prize went to Erasmus University researchers Anita Eerland, Rolf Zwaan and Tulio M. Guadalupe for their study which looked at why leaning to the left makes the Eiffel Tower seem smaller.
US-based Dutch biologist Frans de Wal and American partner Jennifer Pokorny won the anatomy prize for research which showed chimpanzees can recognize their fellow chimps from photographs of their rear ends.
The organisers say the prizes are intended to celebrate the unusual, honor the imaginative — and spur people’s interest in science, medicine and technology.
The prize-giving took place at Harvard University on Thursday night.
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