evergreen

Latest in evergreen

An iPhone plugged into a battery made out of apples and pennies.
DIY

Gray Matter: Apple juice

By Theodore Gray

A DIY newspaper baler made out of plywood, with a stack of newspapers inside of it.
DIY

PopSci DIY: a newspaper baler, updated from the archives

By Joel Barnard

Fresh ramps pulled out of the ground, on a blue tarp.
DIY

Ramps, a wild harvest

By Aki Kamozawa and H. Alexander Talbot

Tiny Core Linux on a computer's toolbar.
DIY

The smallest OS in the West

By Dave Prochnow

A white woman with short black-and-gray hair looking excited behind a chocolate bundt cake with a large slice taken out of it.
DIY

A scientific approach to dessert

By M. Farbman

The white, browned meringue on top of a baked Alaska.
DIY

I don’t know: Alaska

By Laura Silver

A thermal lance made out of bacon cutting a steel pan in half.
DIY

Bacon: the other white heat

By Theodore Gray

A lamp made out of a mold from a plastic bottle, based on a 1961 article in Popular Science magazine.
DIY

Bright Idea: The plastic bottle lamp

By Joel Barnard

A Clare solar cell on top of a US penny.
DIY

Pennywise solar power

By Dave Prochnow

The RingsTrue app ready for sale.
DIY

How to make an iPhone app: part 3

By Dave Prochnow

Diana Eng. Grayscale.
DIY

Fashion Nerd: a whole new kind of DIY

By Stuart Fox

Cellular Lego animations
Science

Cellular Lego animations

By Brooke Borel

Three homemade bubble lights, one blue, one red, and one green, over a small table and a chair.
DIY

Liquid lamps

By Radiohole (Eric Dyer and Maggie Hoffman)

An iPhone with app icons visible.
DIY

How to make an iPhone app: part 2

By Dave Prochnow

A hydrogen-filled soap bubble exploding when touched by a lighter.
DIY

Gray Matter: Blowing (up) hydrogen bubbles

By Theodore Gray

Eight stalks of celery, raw and cooked in different ways.
DIY

Shades of green

By Aki Kamozawa and H. Alexander Talbot

A person holding a modified tinyCylon.
DIY

A really tiny tinyCylon

By Dave Prochnow

A man wearing safety goggles and holding a red-hot in-process engagement ring up to the camera.
DIY

A DIY proposal

By Mike Haney

A normal stream of water coming out of a sink faucet. A person is measuring the stream width with calipers.
DIY

A pop-eyed visual guide to liquid flow rates

By Rob Cockerham

A citrus granita margarita in a glass on a plate outside.
DIY

Agave nectar, a sweetener for any occasion

By Aki Kamozawa and H. Alexander Talbot

Three potted plants with homemade grow lights stuck into the dirt around them.
DIY

DIY grow lights

By Dave Prochnow

A temperature sensor built with Cypress PSoC FirstTouch kit.
DIY

Dot-to-dot programming

By Dave Prochnow

A person holding a white iPod.
DIY

New music from an old iPod

By Laura Silver

A person wearing blue Popular Science coveralls holding a can of compressed air.
DIY

PopSci 5-Minute Project video: insta-cool beer chiller

By Popular Science Team

A man in blue Popular Science coveralls holding a dumbbell made out of old CDs, pointing at the camera, and yelling.
DIY

PopSci 5-Minute Project video: CD dumbbell

By Popular Science Team

A group of people playing poker in a room.
DIY

Straight to video

By Amanda Schupak

Three thin rectangular cork-plugged bottles in a row, the left one nearly full of red vinegar, the middle one half full of yellow vinegar, and the right one about a quarter full of orange vinegar.
DIY

Making vinegar at home

By Aki Kamozawa and H. Alexander Talbot

A fully electric airplane, the ElectraFlyer-C, landing on a runway
DIY

A silent electric plane

By Amanda Schupak

White liquid marshmallow.
DIY

The anatomy of a marshmallow

By Aki Kamozawa and H. Alexander Talbot

A white mug on top of a smart coaster with red LEDs.
DIY

Smart coaster

By Dave Prochnow

A black charcoal grill with its lid on, billowing flames. There's a vacuum cleaner attached to its underside.
DIY

Gray Matter: Making glass in a grill

By Theodore Gray

A man in a white polo shirt standing near an overflowing dresser and looking angry because he can't find his eyeglass case.
DIY

This finder’s a keeper

By Dave Prochnow

Four balls of fried, smoked potatoes stacked on a white plate next to some yuzu-kosho ketchup.
DIY

Xanthan gum, or my first hydrocolloid

By Aki Kamozawa and H. Alexander Talbot

A pink camouflage patterned replica tank sitting in a yard.
DIY

Pedal-powered Panzer

By Rena Marie Pacella

A yellow-and-green model plane against a black background.
Science

Pocket Rocket Komet

By Dave Prochnow

A small paper rocket in a person's hand against a black background.
DIY

The 5-minute rocket

By Dave Prochnow

A packet of freeze-dried ice cream with a photo of an astronaut on the packaging.
Science

If it’s good enough for astronauts, it’s good enough for us

By Aki Kamozawa and H. Alexander Talbot

A piece of pure aluminum after being treated with muriatic acid, having changed color to blue, green, yellow, and red, with crystal-like patterns.
DIY

Gray Matter: Metal’s hidden treasure

By Theodore Gray

A clear bottle of beer next to a full glass of beer, with a six-pack of beer in the background.
Environment

A six-pack of “light” beer

By Dave Prochnow

A .44-caliber bullet impact.
DIY

Make your own ammo

By Theodore Gray

A large steel vehicle with eight legs and a cabin for passengers.
DIY

The Walking Beast

By Charles Crain

A person holding a circuit board.
DIY

A rapid AVR prototype programmer

By Dave Prochnow

All the parts you need to build an LED flashlight.
DIY

How to make an LED flashlight

By Dave Prochnow

A handheld electronic device with a green LCD screen showing the temperature and humidity outside.
DIY

How to hack firmware

By Dave Prochnow

A metal barrel full of steaming liquid nitrogen.
DIY

Playing with ice

By Aki Kamozawa and H. Alexander Talbot

A wooden board with copper nails in it and a large amount of black slime dripping down it.
DIY

Sound minded

By Andrew E. Rosenblum

A person using a metal cocktail stirrer to mix chlorine and hydrogen peroxide in a champagne glass. The liquid is foaming and glowing red-orange.
DIY

Gray Matter: Quantum physics in a glass

By Theodore Gray

A wooden spoon mixing chocolate chip cookie dough in a bowl.
DIY

Chocolate-chip science

By Aki Kamozawa and H. Alexander Talbot

Pectin: not just for jelly
DIY

Pectin: not just for jelly

By Aki Kamozawa and H. Alexander Talbot

A DIY video projector made out of an iPod and a slide-projector lens projecting The Daily Show onto a black background.
DIY

Make an iPod video projector

By Bård Lund Johansen

A person breaking the tail of a Prince Rupert's glass drop, causing the entire piece to explode.
DIY

Gray Matter: Shattering the strongest glass

By Theodore Gray

A custom electric motorcycle with the converter housing, charger port, and controller labeled, against a white corrugated metal wall.
DIY

Riding clean

By Andrew E. Rosenblum

A burning pile of magnesium expelling white smoke against a dark blue background, with a fire extinguisher nozzle nearby setting it on fire.
DIY

Let burning metals lie

By Theodore Gray

A green amphibious vehicle splashing through waves on a body of water.
Technology

Half boat, half car, all adventure

By Rena Marie Pacella

A vintage TV with an iPod connected to it and Family Guy playing on the TV screen.
DIY

Give an old TV a rerun

By Dave Prochnow

A green image of PopSci's editor-in-chief, Mark Jannot on a wall in front of a laser projector.
DIY

The graffiti laser

By Gregory Mone

A white man with graying hair and a straw hat standing in a steaming hot tub on a prairie in front of a canvas painted with palm trees.
DIY

Gray Matter: The instant hot tub

By Theodore Gray

A DIY pocket theremin.
DIY

Build a pocket theremin on the cheap

By Dave Prochnow

A homemade Battlestar Galactica flight simulator.
DIY

A better way to play Battlestar Galactica

By Chuck Cage

An Arduino-powered LED photo cube.
DIY

Build it: a smart, ambient LED

By Dave Prochnow

A beverage can over a flame, with smoke nearby. The can contains liquid nitrogen boiling at -320 degrees Fahrenheit, and liquid oxygen is dripping off at -297 degrees. They burst into flame when they hit a burning paper towel.
DIY

Gray Matter: Flaming oxygen drops

By Theodore Gray

A 1-ounce bar of fine gold, with the Credit Suisse name on it.
DIY

How to make convincing fake-gold bars

By Theodore Gray

A robot lion head mounted as a hunting trophy on a white wall.
DIY

Robot taxidermy

By Dave Prochnow

John Carnett riding his motorized homemade all-terrain skateboard along a sidewalk in Philadelphia.
DIY

A motorized skateboard for speed-happy gearheads

By Doug Cantor