Use your knowledge of groups and periods on the Periodic Table. When you are presented with three elements, pick the one that doesn’t belong.
Track the migration of whooping cranes, once on the verge of extinction. Follow new crane chicks from their hatching to the day they complete their first fall migration at 5 to 6 months of age.
Why do windy winter days seem so bitterly cold? Calculate the wind chill factor and find out.
