Studying humanmade seismic waves is useful for a few reasons. It can help engineers construct safer buildings. City planners ...

Virga refers to rain or snow that evaporates before it reaches the ground.

New sensors can map infrasound — a deep-bass thrumming lower than what human ears can hear — emitted by a fire as its flames ...

What is your favorite way to eat a marshmallow? Melted in hot chocolate after a long day of sledding? Or roasted and squished between a slab of chocolate and graham crackers while you are sitting ...

A shape with symmetry has parts that match each other in some way. Imagine cutting a heart from a piece of paper. To ensure the two halves match perfectly, you might fold your paper in half. Then, you ...

Chocolate-chip sea stars are famous for the rows of dark, pointy bumps that cover each of their arms. The animals really look like they’re dotted with chocolate chips. But what’s inside their arms is ...

Telescopes keep getting bigger — and more expensive. Researchers with the European Southern Observatory are building one telescope in Chile, for instance, called the Extremely Large Telescope. It will ...

Even in ancient times, stargazers knew that planets differed from stars. While stars always appeared in the same general place in the night sky, planets shifted their positions from night to night.

This is a chart that shows all the known chemical elements. The table is made up of over a hundred squares. Each square represents one element. A square contains one or two letters that stand for the ...

In everyday life, we often use the words “mass” and “weight” as if they’re the same. But in science, it’s important to be precise. Mass and weight are both measurements that describe heaviness, but ...

In November 2014, Zoë MacGregor celebrated her 13 th birthday. Like any teen might, she invited a friend to her house for a sleepover. They ordered pizza, had brownies and ice cream for dessert, then ...