McDermott says that he started seeing a dermatologist when he was in his 20s at the recommendation of his parents.

The lowest part of the epidermis, the basal layer, is formed by basal cells. These cells continually divide to form new cells to replace the older ones that wear off the skin's surface.

The ocean melts ice shelves from below – a process known as “basal melting”. Increased basal melting has led to the thinning ...