Box jellyfish learn from collisions – without a central brain.
A team from Copenhagen and Kiel put fingernail-sized Caribbean box jellyfish into a tank with grey stripes that mimicked distant mangrove roots. After 7.5 minutes they kept about 50 percent more distance.
Fits with this
Nº 028 · Nature
Octopuses have nerve cells in their arms.
Two-thirds of their nerve cells are in their arms. In total, an octopus has over 500 million.
Nº 066 · Nature · 50 sec
A brainless slime mould designed a network like Tokyo's railways
Oat flakes were laid out like the cities around Tokyo. After about a day, a yellow single cell had linked them – much like the real rail network.
