Why a brainless yellow 'blob' that can learn is mystifying scientists

A yellow organism which looks like fungus but acts like an animal has gone on display at the Paris Zoological Park.

The slime mould - Physarum polycephalum - has almost 720 sexes and has been described as one of "nature's mysteries" by scientists.

It can heal itself in two minutes if cut in half, and detect and digest food despite not having eyes, a mouth or a stomach.