Read the latest articles from Popular Science (Page 645)

Spaceman documents Mike Massimino's unlikely journey from fire inspector's son to elite astronaut

There may be much more coral diversity out there than previously thought.

Researchers used Halloween SFX to simulate the Martian south pole in springtime.

The state aims to cut a quarter of its carbon emissions by 2025.

A new prototype scout drone can be printed for less than the cost of the latest iPhone

Here comes the dirt bike, beware of the dirt bike.

New autonomous vessels possible within a decade.

In a small desert ceremony, the military prepared to defend the heavens

The United States uses a whole arsenal of tools to carry out the targeted killing policy detailed in a recent DOJ memo. Why is everyone focusing on drones?

And everyone else.

An easy backyard physics experiment

Ryan Knapp works at the Mount Washington Observatory, where the wind chill can drop below -70 degrees.

Make your own portable hot packs

Despite heavy regulation and environmentalist pushback

An exclusive first look at a UN Institute Report on the risks of autonomous weapons.

Alcohol allergies are pretty rare, but intolerance is a lot more common.

Here's what you need to know this week.

New evidence points to volcanic activity just 50,000 years ago, a short timespan in the grand scheme.

When the lights go off, so do ventilators, oxygen tanks, and more. But backup emergency systems are sparse, even as the US power grid grows more unstable.

It’s more complicated than you think.