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Alien life forms could take many forms. Here a large fish swims in a liquid ocean beneath the frozen crust of a Europa-type world. Shafts of sunlight filter through cracks in the ice.

Lynette Cook is a self-employed scientific illustrator who has focused on exoplanets and life in space throughout her professional career. She is a Fellow of the International Association of Astronomical Artists. More artwork by Cook is at http://extrasolar.spaceart.org.

Lynnette Cook is a member of the International Association of Astronomical Artists.