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THE DOOMSDAY DETECTIVES: How Walter and Luis Alvarez Solved the Mystery of Dinosaur Extinction
by Cindy Jenson Elliott; illustrations: Theo Nicole Lorenze

THE DOOMSDAY DETECTIVES: How Walter and Luis Alvarez Solved the Mystery of Dinosaur Extinction by Cindy Jenson Elliott; illustrations: Theo Nicole Lorenze

★KIRKUS (starred): “ An outstanding resource that depicts the winding and complex journey of scientific exploration.”

And dinosaurs!

Lee & Low/TU BOOKS * March 2025 * 224 * Middle Grade NONFICTION/ages 10-13

Cretaceous earth was known as the age of dinosaurs. But really, it was the age of LIFE–scaled and feathered, furry, and leathered, budding, blooming, roaring, zooming, buzzing, glorious LIFE–until…DOOMSDAY.

For 66 million years, the mystery of what happened to the dinosaurs lay hidden under layers of sand and silt, until scientists began to piece together the puzzle of what happened on the last day of the ancient world.

Follow the real-life adventures of father-son scientists Luis and Walter Alvarez–along with an army of science detectives–as they unlock the world’s most intriguing mystery. Learn how the smallest particles in the universe helped explain what happened to the largest animals that ever walked the planet. Track the timelines of discoveries that had to happen in physics, paleontology, astronomy, and geology, before humans could understand how and why 75 percent of species suddenly went extinct.

This is the story of how scientists add to the sum total of human knowledge, one question at a time, and help us understand our beautiful, tragic, and magnificent world.

★KIRKUS (starred) full review: “A look at a father-and-son team’s journey to discover the scientific reasons why dinosaurs went extinct. The book opens with dynamic black-and-white illustrations that dramatically depict the thriving flora and fauna of the Cretaceous Period, including dinosaurs, plants, and microscopic life. But what happened to the dinosaurs? Luis and Walter Alvarez, Cuban American father-and-son scientists, set out to solve this mystery. In 1980, they published a paper in Science magazine describing their hypothesis that an “extraterrestrial impact somewhere on Earth” led to the dinosaurs’ extinction. Strong, descriptive writing interspersed with engaging graphic novel panels together support the explanation of complex scientific concepts, including plate tectonics, historical evidence in rocks, and how evidence from outer space and the ocean connects to Earth’s geologic time scale. The Alvarezes spent years gathering proof to support their hypothesis, but the book shows how scientific theories are often controversial and even divisive. Informative sidebars highlight the diverse group of scientists who contributed to solving the mystery of extinction. But as is often the case, one finding leads to many more questions: “In science, no one has the last word.” The book closes by introducing contemporary scientists who are researching the doomsday event. Packed with explanations of scientific terminology and methods of operation, this detailed and compelling book is a superb guide for curious STEM-focused readers.”

Cindy Jenson-Elliott is a science and writing teacher for children of all ages and adults, and is the author of 18 nonfiction books for children. Theo Nicole Lorenz is the illustrator behind several books, including Dinosaurs with Jobs, Unicorns Are Jerks, and The Trans Self-Care Workbook.