One of the covers of Development this year is reserved for an image from the International Course on Developmental Biology, UNAB, Quintay-Chile. This course ran from 5-17 January in Chile. You can read a report from the course on the Node.
Which image will get the coveted cover spot is up to you to decide. Choose your favourite before May 21st, noon GMT. There are 8 images to choose from. Click any of them to see a bigger version.