How does water turn into ice? Why is ice sometimes slippery and other times sticky? Why is it so cold? Why does it float? How are icicles made? Why are icebergs mostly underwater? What was the ice age?

Philadelphia firefighter Lisa Desamour says a healthy curiosity about fire is a good thing, and kids should feel comfortable asking questions. But they also need to know basic fire safety.

We wade into a Vermont pond with herpetologists Jim Andrews and Kate Kelly! We also get a preview of the new Earth Rangers podcast.

We learn about weather forecasting with National Weather Service Meteorologist Jessica Neiles and NBC5 Chief Meteorologist Tom Messner

This episode is all about bugs!

We make a few sheets of paper and learn all about how it’s made with artist Carol Marie Vossler at BluSeed Studios in Saranac Lake, New York.

Electrical Engineer Paul Hines answers our questions for the second half of our electricity live call-in program.

Electrical Engineer Paul Hines answers our questions, in part one of our live call-in program.

How do trains work?

We answer all of your nutrition questions with Wesley Delbridge of the Academy of Nutrition and Dietetics.

We’re heading to the coast of Maine to learn a little bit about why the sea is salty and how mussels get their shells with Zach Whitener, a research associate at the Gulf of Maine Research Institute in Portland, Maine.

We talked about space exploration with Jim Green, chief scientist at NASA. We also learned about NASA’s mission to return to the moon and answered your space exploration questions.

We have a whale of a time answering questions about these ocean-dwelling mammals with paleontologist Nick Pyenson, author of Spying on Whales: The Past, Present and Future of Earth’s Most Awesome Creatures.

This week we’re talking about how non-human animals think and feel and behave, and in what ways their thoughts and emotions are the same as humans or different from humans.

This week we’re learning more about the development of the human brain with Celeste Kidd, professor of psychology and primary investigator at the Kidd Lab at the University of California Berkeley.

We’ll learn more about the sounds whales make: singing, whistles, and echolocation clicks with Amy Van Cise, a biologist at NOAA Northwest Fisheries Science Center in Seattle, Washington.

While forest fires can happen almost anywhere, some parts of the world are more prone to them than others, because of weather conditions and landscape.

This week, we’re getting out our bug nets and talking about dragonflies and ladybugs!

On Friday, June 12th we answered your question about trees and tree communication with scientists Alexia Constantinou and Katie McMahen of the Simard Lab at the University of British Columbia.