Cow would have a mass of between 400 and 800 pounds. A 100-foot-tall, 120-ton rocket would boost it to a speed of 23,827 miles per hour on a path toward the moon.

For Cow Week, NPR's Wade Goodwyn blows the lid off of a children's nursery rhyme. He talks to Modern Farmer correspondent Tyler LeBlanc about whether a cow could jump over the moon.