Space

Instant Egghead - Comets versus Asteroids

May 14, 2012

Share
Email

If you answered "one of Santa's reindeer" and "a popular video game from the '80s"--this episode of Instant Egghead is for you. Scientific American editor John Matson explains how our favorite space rocks differ.

All Videos tab arrow

Scientific American Exclusives tab arrow

Instant Egghead tab arrow

Why Stress Is Good for You Hovering "Home Drone" Puts Burglars on Display Penitent Hacker Aims to Protect World's ATMs 'Apps for Asia' Offers Solutions to Poverty-Re... Audubon's Birds Live On Long After His Death Why Barns Are Red - The Countdown #22

Showing 1-6 of 805

1 2 3 4 5 > >>
How Do Tornadoes Form? Why Barns Are Red - The Countdown #22 Why Stress Is Good for You Hovering "Home Drone" Puts Burglars on Display Penitent Hacker Aims to Protect World's ATMs

Showing 1-5 of 5
Why Stress Is Good for You
Santander Claims Title as Europe's "Smartest" ... Wooden Solar Cells Shine Light on Cleaner Power Urban Algae Turns Wastewater into Energy Wooden Radio Broadcasts Sustainable Message Lagos School Girls Harness the Power of Pee Green Toilet Saves Water, Feeds Garden

Showing 1-6 of 102

1 2 3 4 5 > >>
Bird 'Crouch' Developed in Dinosaur Ancestors What Color Were Dinosaurs? - Instant Egghead Who Was the First Human Ancestor? - Instant Eg... How Does Radiocarbon Dating Work?- Instant Egg... How Do Animals Become Zombies? - Instant Egghead Instant Egghead - Are We Facing the Sixth Mass...

Showing 1-6 of 57

1 2 3 4 5 > >>
Decades-Old Stroke Damage Reversible with Oxyg... Going Viral to Stop Superbugs China Bird Flu Spurs Drive for Universal Vaccine 3D Printer Produces Artificial Ears New Implant Brings High Hopes for Back Pain Re... 3D Printer Builds Human Tissue-Like Substance

Showing 1-6 of 96

1 2 3 4 5 > >>
Why Stress Is Good for You Billion Dollar Project to Recreate the Human B... Curved Glass Linked to Fast Beer Drinking Instant Egghead - What Is the Ames Illusion? Mind-Controlled Aircraft No Longer Unthinkable Instant Egghead - How Do 3-D Glasses Work?

Showing 1-6 of 56

1 2 3 4 5 > >>
Why Barns Are Red - The Countdown #22 Gemini's Paraglider Landing System How Do Astronomers Find Exoplanets? Antarctica's Supernova Sand - The Countdown #21 Missing Mars Lander Found? - The Countdown #20 How Massive Stars Are Born - The Countdown #19

Showing 1-6 of 92

1 2 3 4 5 > >>
Hovering "Home Drone" Puts Burglars on Display Penitent Hacker Aims to Protect World's ATMs 'Apps for Asia' Offers Solutions to Poverty-Re... Autonomous Attack Drone Flies into History The World's Lightest Material Unmanned Combat Jet Passes Flight Test

Showing 1-6 of 343

1 2 3 4 5 > >>
Why Stress Is Good for You 'Apps for Asia' Offers Solutions to Poverty-Re... Why Barns Are Red - The Countdown #22 Autonomous Attack Drone Flies into History The World's Lightest Material Bursting Bubbles Governed by Mathematics in Mo...

Showing 1-6 of 378

1 2 3 4 5 > >>

Post a Comment | Read Comments (0)

submit to reddit

Comments

More from Scientific American

News | 1 hour ago
Shooting the Wheeze: Whooping Cough Vaccine Falls Short of Previous Shot’s Protection
Guest Blog | 1 hour ago
Dissecting the controversy about early psychological response to disasters and trauma
Ask the Experts | 6 hours ago | 1
What Role Does Climate Change Play in Tornadoes?
Reuters | 6 hours ago
The 10 Deadliest Tornadoes in U.S. History
Reuters | 6 hours ago
Survivors Pulled from Oklahoma Tornado Debris

Follow Us:

See what we're tweeting about

Scientific American Editors

beatricebiology haha! Wolf Blitzer: "Do you thank the lord [since you didn't die in the tornado]?" Lady: "Actually, I'm an atheist." http://t.co/N3xjjcvKO2
1 minute ago · reply · retweet · favorite
BoraZ A Machine to Weigh the Soul http://t.co/fMISm6GKT4
1 minute ago · reply · retweet · favorite
Myrmecos Nice, but the picture shows a fly. MT @avflox The truth behind the hoax about the man who f*ed a hornets nest: http://t.co/34vuS3NdqL
3 minutes ago · reply · retweet · favorite

Free Newsletters

Get the best from Scientific American in your inbox

Solve Innovation Challenges

Identify Organisms from a Stream of DNA Sequences
Deadline: Jun 30 2013
Reward: $1,000,000 USD

This is a Reduction-to-Practice Challenge that requires written documentation and&
Male/Female Differences in the Pathogenesis and Presentation of Alzheimer’s Disease in Pre-symptomatic, Early Symptomatic and Late Stages
Deadline: Aug 31 2013
Reward: $100,000 USD

The Geoffrey Beene Foundation Alzheimer’s Initiative (GBFAI) is launching the 2013 Geoffrey Beene Global NeuroDiscovery Challenge whose
More Challenges »

Powered By: Innocentive

SA Digital

Latest from SA Blog Network

Dissecting the controversy about early psychological response to disasters and trauma
Guest Blog | 1 hour ago
Why Are Barns Red?
Image of the Week | 1 hour ago
The SciArt Buzz: ScienceArt On Exhibit In May/June 2013
Symbiartic | 3 hours ago
Physics, Metaphysics and Cosmology Collide in New E-Book, Possibilities in Parallel: Seeking the Multiverse

STAFF
@ScientificAmerican | 3 hours ago
My Heart is in Oklahoma now #OklahomaStrong
The Urban Scientist | 4 hours ago

SA Digital

News From Our Partners

Science Jobs of the Week

Mid-level Tenure Track Position Indiana University School of Medicine
Postdoctoral researcher in innate immunity Massachuesetts General Hospital / Harvard Medical School
Professor in Secretion Research Uppsala University
More jobs from Naturejobs.com »

risk free title graphic

YES! Send me a free issue of Scientific American with no obligation to continue the subscription. If I like it, I will be billed for the one-year subscription.

cover image

Scientific American is a trademark of Scientific American, Inc., used with permission

© 2013 Scientific American, a Division of Nature America, Inc. View Mobile Site All Rights Reserved.

Email this Article

X

Scientific American Magazine

Subscribe Today

Save 66% off the cover price and get a free gift!

X

Please Log In

X

Account Linking

Welcome, . Do you have an existing ScientificAmerican.com account?

X

X

X

Error

X

Share this Article

X