“Whoa! Slow down!” said Annie. They were almost at the mountain pass. Suddenly, a cloud of dust flew up in front of them. The ground trembled. “Watch it!” cried Annie. Jack couldn’t see a thing. He stepped on the brake. The dust settled. A giant rock between two walls of rock. They were trapped! Jack quickly found a picture of a giant rock in the moon book. He read aloud. Rocks of all sizes crash into the moon from outer space. These rocks are called meteorites. “We’re lucky that meteorite didn’t land on us,” said Jack. “Yeah, and I guess it’s too big to be the M thing,” said Annie. She had climbed out of the moon buggy and was standing by the meteorite. It was more than twice as tall as she was