IMPACT

An exploration of the role meteorites played in the formation and cultural evolution of Earth.

Had Earth’s head-on collision with the meteorite named Theia not occurred exactly when it did, our planet would have evolved much differently. Brennecka, a cosmochemist at Lawrence Livermore National Laboratory, explains that this event, and later impacts, “may have delivered the organic material from which life developed, as well as the water on Earth that sustains it.” In this highly entertaining book, filled with informative and humorous charts, diagrams, and images, the author explores this moon-forming impact as well as other historical cosmic events involving space rocks—e.g., the 1990 discovery of an impact crater in Mexico that scientists believe caused the extinction of dinosaurs. Other topics include: Christopher Columbus’ using his knowledge of an upcoming lunar eclipse to avert an uprising when he had outstayed his welcome in Jamaica, Donald Trump’s staring directly at the sun without eye protection during the 2017 solar eclipse, and how “Mark Twain was born and died on occurrences of Comet Halley.” Brennecka also examines how meteorites have played a significant role in cultural and religious teachings throughout the world, including Aboriginal lore, Greek and Roman literature, biblical studies, and Islamic tradition, and he takes us to regions around the world where large numbers have been extracted: Australia, the Sahara Desert, and Antarctica, among others. The increased availability of samples has aided countless scientists in their research about Earth’s cosmic origins, but the meteorite trade has also led to the removal of objects that were treated as sacred by Indigenous peoples and made it difficult for research groups working on tight budgets. “Regardless of the discussion about the morality and business of meteorites,” writes the author, “meteorite monetization has been both a blessing and a curse for meteorite researchers.”

Brennecka’s enthusiasm for meteorites will appeal to experts and novices alike.