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The instrument is an early version of a training device popularized by optometrists.
The universe's oldest light is one of the great pieces of evidence for the Big Bang.
A small Scottish island is now the sole source of Olympic curling stone granite.
A recently described 100 million-year-old fossil is the most complete flowering plant from the Cretaceous discovered.
Evidence suggests that these fireballs don't come from a comet, but an asteroid with a tail.
In 1969, the Apollo 11 astronauts heard about a mythical goddess who lives on the moon with her rabbit companion.
A collection featuring Carl Sagan paraphernalia is open to the public at the Library of Congress.
The brown and black bristles help the caterpillar survive harsh winters.
The phenomenon has impressed people for centuries, but it has yet to be created in the lab.
This olive-like structure is composed of tiny luminescing spheres that could be used in cellular imaging.
The Tissandier brothers contributed to France's reputation as the balloon capital of the world.
NASA's MISR experiment snaps pictures of Earth, keeping tabs on environmental attributes from aerosols to smoke plumes.
The Nobel Prize winner talks about his passion for science and art, where he does his best thinking, and why he likes bow ties.
Comet Swift-Tuttle's rocky debris inspired SciFri fans to snap away at the night sky with their cameras.
Rajesh Verma's modified soap dispenser promotes squeaky clean hands.
A new image from NASA's Cassini spacecraft features Earth as a speck, recalling our planet's first portrait taken from the outer solar system more than 20 years ago.
Benjamin Franklin invented an instrument that takes musical glasses to a whole new level.
July 4th isn't just Independence Day—it's the anniversary of Rube Goldberg's birthday.
Laura Overdeck, the founder of Bedtime Math, shares a brain teaser for your kids.
How a sketch on a placemat became a symbol for Seattle.
The 15 titles on our list are just the tip of the science writing iceberg.
A project for the Virginia Museum of Natural History is more than a bunch of hot air.
Insects pack a protein punch. Get the most of your meal with these recipes.
Recommend your favorite science-themed books, and SciFri will compile a list of the top 15.
Celebrate our awesome blue-and-green planet with this SciFri sampler.
For some predators, chowing on a monarch butterfly can have digestive repercussions.
That bittersweet longing for the past can have an important impact on the present.
Were you aware that saguaros are black market commodities? Here're some other cool cactus facts.
It's Pi Day (and Einstein's birthday). Celebrate with this mix of tributes to the telltale Greek letter that symbolizes that endless number.
For a unique artistic style, there's nothing like an insect's feet to get the job done.
Pick your favorite photo from the 11 finalists.
Voting for your favorite Winter Nature Photo Contest submissions starts today at 2 p.m. EST.
A meteor streaks over Russia, just before Earth's close shave with an asteroid.
Whipping up a yummy Martian snack isn't as hard as it might seem.
Polish researchers have devised a way to send encrypted messages using Skype.
For 520 days, six men lived together in a simulated mission to Mars. Here's what their home away from home looked like.
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