evergreen (Page 39)

Latest in evergreen

Ferrofluid forming a pile of conical shapes.

How to make ferrofluid

An R2-D2 cooler in the corner of a carpeted room, with video game controllers organized in front of it.

Now this is the droid we’re looking for

By Popular Science Team

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

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.

Bright Idea: The plastic bottle lamp

By Joel Barnard

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

Liquid lamps

By Radiohole (Eric Dyer and Maggie Hoffman)

An iPhone with app icons visible.

How to make an iPhone app: part 2

By Dave Prochnow

A person holding a white iPod.

New music from an old iPod

By Laura Silver

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

PopSci 5-Minute Project video: CD dumbbell

By Popular Science Team

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.

Making vinegar at home

By Aki Kamozawa and H. Alexander Talbot

White liquid marshmallow.

The anatomy of a marshmallow

By Aki Kamozawa and H. Alexander Talbot

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

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

By Aki Kamozawa and H. Alexander Talbot

Pectin: not just for jelly

Pectin: not just for jelly

By Aki Kamozawa and H. Alexander Talbot

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

Let burning metals lie

By Theodore Gray

A DIY pocket theremin.

Build a pocket theremin on the cheap

By Dave Prochnow

A person striking a block of plastic with a hammer, creating white lightning against a blue background.

Gray Matter: Trap lightning in a block

By Theodore Gray

A person wearing white work gloves striking a match on a light brown surface against a blue background.

Making a perfect match

By Theodore Gray

A person purifying silicon in a glass bowl. Top: burning magnesium in a mushroom cloud of white smoke; middle top: burning hydrogen as a flame; middle bottom: burning silane gas as white bursts; bottom: falling silicon particles.

Making silicon from sand

By Theodore Gray

Liquid nitrogen vanilla ice cream in a goblet glass with a strawberry on top and water vapor all around it.

Microcrystalline in 30 seconds

By Theodore Gray