
Pea-size clusters of human cells called brain organoids inspire both hope and fear. Experts are debating how scientists can responsibly use these bits of gray matter.
(Image credit: Institut Pasteur-SupBiotech/NASA)

Pea-size clusters of human cells called brain organoids inspire both hope and fear. Experts are debating how scientists can responsibly use these bits of gray matter.
(Image credit: Institut Pasteur-SupBiotech/NASA)