Happy Valentine's Day!

Do these hearts look strangely familiar to you?




H2O2



Hydrogen Peroxide



Ozone


Oxygen

Courtesy of Muse, the world's best magazine for tweens!

February's cover features "Oxygen: A Love Story" -- an excerpt from Gabrielle Walker's new book, An Ocean of Air: Why the Wind Blows and Other Mysteries of the Atmosphere, which tells how Earth's atmosphere developed.

I just loved the way it looked!