Biologists have performed the first large-scale screening in a vertebrate animal.

• Position: Science scene - Brief article

Biologists have performed the first large-scale screening in a vertebrate animal for genes that regulate sleep, and have identified a gene that, when overactivated, causes severe insomnia. Expression of neuromedin U (Nmu) also seems to serve as nature's stimulant--fish lacking the gene take longer to wake up in the morning and are less active during the day. In the long term...