Tiny Human Brains Grown in Lab

About the size of peas

Miniature "human brains" have been grown in a lab in a feat scientists hope will transform the understanding of neurological disorders.

The pea-sized structures reached the same level of development as in a nine-week-old foetus, but are incapable of thought.

The study, published in the journal Nature, has already been used to gain insight into rare diseases.