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A Pacific white-sided dolphin swims alongside the research vessel Atlantis during an October 2006 cruise off the Oregon coast. Pacific white-sided dolphins and their Atlantic counterparts are known as avid bow-riders and acrobatic jumpers. Able-bodied seaman Lance Wills, who snapped this photo, said a school of about 200 dolphins swam with the ship for a half-hour. Atlantis will have an opportunity to interact with different dolphin species during its upcoming cruise to study the relationship between plankton and cloud-forming aerosols on the NASA-NAAMES cruise beginning soon. (Photo by Lance Wills, Woods Hole Oceanographic Institution)