Explanation for why we don't see two-foot-long dragonflies anymore fails

Breathing capacity could have compensated for lower atmospheric oxygen. [...]

A large meteor is visible from much of Ohio and parts of neighboring states

Meteor's fiery passage through the atmosphere was captured by a space-based lightning mapper. [...]

How Can a Locomotive Pull a Long Train That’s Much Heavier?

For railroads, it’s all about managing static and kinetic friction. [...]

Astronomers are filling in the blanks of the Kuiper Belt

Next-generation telescopes are mapping this outer frontier. [...]

MasterClass deal: It's the last day to get 50 percent off subscriptions

MasterClass has dropped the price of its annual memberships by 50 percent, making it a more affordable way to explore its full library of courses across cooking, business, photography, writing and mor [...]

The Nothing That Has the Potential to Be Anything

You can never truly empty a box. Why? Zero-point energy. [...]

"It ain't no unicorn": These researchers have interviewed 130 Bigfoot hunters

What prompts this community to spend time looking for a creature that likely doesn't exist? [...]

Ancient Mars was warm and wet, not cold and icy

Kaolinite pebbles show evidence of alteration under high rainfall conditions. [...]

A fluid can store solar energy and then release it as heat months later

Sunlight can cause a molecule to change structure, and then release heat later. [...]