Stacy McAnulty is the author of over thirty books for children, notably the nonfiction picture book series Our Universe, which includes titles, Earth! My First 4.54 Billion Years, Mars! Earthlings Welcome, and Moon! Earth's Best Friend, among others. She's also the author of picture books A Small Kindness, Beautiful, Brave, and Love, and she writes books for middle grade readers including The Miscalculations of Lightning Girl, and Millionaires for the Month. Stacy lives in North Carolina with her family and as many dogs as she can sneak in the house.

Matthew Rivera earned his bachelor's degree in fine arts from the University of Arizona. After many years of being an art director for agencies, corporations, and toymakers, Matthew now writes and illustrates stories for children. He has illustrated many best-loved picture books, including Roxy the last Unisaurus written by Eva Chen.