Nick Pyenson is the curator of fossil marine mammals at the Smithsonian Institution’s National Museum of Natural History in Washington, D.C. His scientific discoveries frequently appear in The New York Times, The Washington Post, National Geographic, the Los Angeles Times, The Economist, Popular Mechanics, USA Today, and on NPR, NBC, CBC, and the BBC. In the sweeping nonfiction picture book The Whale Who Swam Through Time: A Two-Hundred-Year Journey in the Arctic (Roaring Brook Press), illustrated by Alex Boersma, Pyenson explores the 200-year lifespan of a bowhead whale and the changing environment that surrounds her, from peace and solitude to oil rigs and cruise liners. The journey begins with the birth of a bowhead whale, the longest-living mammal in the world. With gorgeous, detailed, and striking illustrations, this well-researched and thoughtfully curated nonfiction story captures the natural world’s magic and beauty while providing a thoughtful account of how humans have impacted our changing ecosystems. It’s a beautifully presented call to action to protect our environment.