SI—Q

Which animal can have a brain so large it overflows into its legs?

Spiders. Smithsonian researchers report that the brains of tiny spiders are so large that they fill their body cavities and overflow into their legs. Nine species of spiders were measured. As the spiders get smaller, their brains get proportionally bigger, filling up more of their body cavities.

Brains, delicious braaiins! ›