Dr. Universe: Is the puffin a descendent of the dodo?
-Samykutha, Chennai, India
The dodo bird isn’t with us anymore, but if you visit a city park you’ll likely see one of its very close relatives walking around. It might even be nibbling on a French fry. Dodos were a pigeon, said my friend Michael Webster. » More …
What are the cookies used on gadgets? -Lydia, 8, Essex, England
A cookie is a tiny file of text that gathers information about you as you browse the web. You might be familiar with cookies if your computer has ever asked if you wanted to turn them on or off. » More …
Why are ripe fruits sweet and why is it so important? -Alexa, Schenzhen, China
My friend Kate Evans said the answer really depends on whether you want the perspective of a person, a plant, or even a cat. Evans is a plant scientist at Washington State University in Wenatchee, where she investigates fruit in the Apple Capital of the World.
She explained how long ago, wild apples actually grew in forests. Without farmers around to plant them in orchards, trees had to scatter their own seeds to survive.
For some trees, the key to survival is growing sweet, ripe fruit. » More …