Squeak! Grrr! CRACK! Shhh! Our world is filled with sounds big and small, pleasant and annoying. ...

The latest scientific research on home birth, breastfeeding, sleep training, vaccines, and other ...

The Earth rotates on its axis, causing day and night, and revolves around the Sun, causing change...

Vaccines are biological substances that cause the human immune system to build up its defenses ag...

A region's climate affects nearly every part of animals' and peoples' lives. Learn about how huma...

Living on a world as vast as Earth, it can be easy to forget that our planet is just a tiny speck...

A region's climate affects nearly every part of animals' and peoples' lives. Learn about how huma...

When you flip a light switch, it turns on the light. But how? Where does that energy come from? H...

Squeak! Grrr! CRACK! Shhh! Our world is filled with sounds big and small, pleasant and annoying. ...

What makes up every single thing in the universe? Teeny tiny specks called atoms. Atoms are the t...

Did you know that much climate change is caused by natural events? But how do humans influence cl...

A crack of lightning. The blue glow of a phone screen. A blinking firefly. The blazing sun. A cam...