Young Johnny is gung-ho and full of courage. Johnny’s brainiac twin sisters, Susan and Mary, use Johnny as their guinea pig for their outrageous scientific experiments. If they can dream…

Young Johnny is gung-ho and full of courage. Johnny’s brainiac twin sisters, Susan and Mary, use Johnny as their guinea pig for their outrageous scientific experiments. If they can dream…

Proposes a minute-by-minute chronology of the Chicxulub impact and its effect on the dinosaurs and other animals around the world.