Dad and Son: Quick Q&AOnline version A father helps his curious son. by Arnab Biswas Boy Dad, why is the sky blue? Dad Because sunlight hits the atmosphere and blue light scatters more than red. Boy Do birds sleep at night? Dad Most birds settle down when it’s dark, just like us. Boy What makes a rainbow? Dad Light bending through raindrops splits white light into colors. Boy Can I learn to ride a bike today? Dad First you balance, then you pedal. I’ll help you. Boy I’m excited but a little nervous. Dad That’s normal. We’ll practice together and you’ll get it.