Prize crossword WIN!

Fill in the grid then rearrange the letters in the orange shaded squares to find the secret word (7). Complete the answer form and send to the following address by 1 February 2007: Vital, BDJ, Nature Publishing Group, 4-6 Crinan Street, London N1 9XW.

The sender of the first correct solution drawn on 1 February will win a magnum of Laurent-Perrier Brut champagne.

The answers and name of the prize winner will be announced on 10 March 2007, when the spring issue of Vital magazine is published in print and online. Check out www.nature.com/vital .

Secretword winner

Receptionist Louise Mason from Nottingham won the autumn Secretword. The secret word was POLYTRAY. The completed crossword is shown below.