Marian B. Jacobs

• Why do leaves change color?
• Coping with hereditary diseases
• Why can airplanes fly?
• Why did the dinosaurs become extinct?
• Why Do Airplanes Fly? (The Library of Why)
• Why do the ocean have tides?
• Why does it rain?
• Why is the sky blue?
• The Library of Why
• Why Do the Oceans Have Tides?