Astronaut Scandal Spells Changes for Mars Trip

Skill Set: How to Snap a Fastener (with Video)

There are plenty of tools for removing a damaged fastener, but sometimes even old favorites don't work. Senior home editor Roy Berendsohn breaks down the best tools, then walks you through a quick DIY video fix from PopMech TV.

• HOW-TO CENTRAL: Fix Your Leaky Faucet
• TOOL WATCH: Battery-Powered Sump Pump

3D Model of Water-Soaked Underground Could Upend Geology

Scientists have discovered what they believe to be an Arctic Ocean-size reservoir of water lying deep beneath the Earth’s surface. The anomaly could have a big impact on the study of water as a catalyst for geological activity.

• ANTARCTIC BLOG: Measuring Ice from Inside the Earth
• PLUS: Las Vegas Tries to Prevent a Water Shortage

How to Repair Stripped Spark Plug Threads: Auto Clinic

Spark plugs that haven't been changed for a long time can become one with the cylinder head. Fortunately, it's possible to repair damaged threads instead of scrapping the head.

• PLUS: Jesse James Installs Spark Plugs on a Flying Car
• SATURDAY MECHANIC: Fixing a Dented Door
• AUTO CLINIC: Silence a Hissing Engine
• CLASSIC TIP: Jumpstart Your Car Safely

Drills, Bricks and More: The Best from the International Builders' Show

From next generation homes to nerve-saving demolition drills, the International Builders' Show in Orlando, Fl., is filled with meanest pro tools money can buy. Find out what you need for your toolbox with on-scene reports from senior home editor Roy Berendsohn and deputy editor Jerry Beilinson.

Nokia N800 Puts the Internet in the Palm of Your Hand: Out of the Box

Instapundit's Glenn Reynolds a blogger, posting from cars and airplanes, which means he's usually toting a laptop with wifi and EVDO. It's a small laptop, but it seems big enough when he's carried it around all day. The $400 Nokia N800 just might be the answer.

• VIDEO: Nokia Internet Tablet at CES
• PLUS: Glenn Reynolds' PM Tech Blogging
• TECH CLINIC: Does Your Laptop Need a New Wireless Router?

Bombardier Unveils 3-Wheeled Wonder

Soon we’ll be test riding this wild-looking three-wheeler, officially known as the B.R.P. (Bombardier Recreational Products) Can-Am Spyder Grand Sport Roadster. Yes, that sure is a mouthful to say, but it'll be interesting to see if the trike is a handful to ride.

• PLUS: New Motorcycle Tests

Pontiac G8 and More Cars from the Chicago Auto Show

Differing only slightly from the production model of Pontiac's new performance sedan, this show model of the Australian-based G8 has its grand unveiling in the Windy City Wednesday.

• MORE FROM CHICAGO: Ford Freestlye
• MORE FROM CHICAGO: Mercury Montego
• MORE FROM CHICAGO: Saturn Shows Off
• MORE FROM CHICAGO: Super-Luxury BMW Alpina B7

Safer Train Tank Car Tech Rolling Down the Line

Last month's train derailment in Kentucky highlighted the need for improved safety in the pressurized tank cars that carry millions of pounds of toxic chemicals around the country each year. Those improvements are coming (eventually) through an important new initiative.

• PLUS: Train of the Future
• PM NEWS: Tanker Derails Near Louisville
• WHAT WENT WRONG: Toxic Train Wreck

2009 Toyota Prius: Spy Report

Here's a good look at the next-generation Toyota Prius. The inside word from Japan is that the '09 version of the landmark hybrid will deliver both better fuel economy and more power.

• SPY REPORT: 2008 Jeep Liberty

Apple to Music Industry: DRM Is Your Fault

Steve Jobs essentially wrote an open call to the music industry to do away with the digital rights management system. It’s a brilliant PR move by Apple—absolving it of responsibility for a system that offers no benefit to legal customers, and almost no hindrance to pirates.

• COMMENTARY: Bossy Gadgets and DRM's Limits
• ANALYSIS: Music Industry Needs to Listen to Us
• LIVE BLOG: Steve Jobs Announces the iPhone
• PODCAST: The Future of Entertainment

Stem-Cell Fast Food: From NASA to Nourishment

It sounds like a sci-fi nightmare: giant sheets of grayish meat grown on factory racks for human consumption. But it's for real. Using pig stem cells, scientists have been growing lab meat for years, and it could be hitting deli counters sooner than you think.

• ENERGY BLOG: How Much Oil Is in Our Food System?
• PM NEWS: Is Fish Really that Good for Us?

Stanley's FatMax Snap-Off Knife: Gadget of the Week

What qualifies this behemoth cutting tool as a gadget? It can store up to four snap-off blades in a removable cartridge, each one loading into place like a bullet, and the whole cartridge loads from the base like a pistol magazine. Check out a preview, with video.

• PLUS: High-Tech Hunting Gear
• TOOL WATCH: Our Favorite Turkey Knives