Robin Hammond / The New York Times / Redux

1. Top 10 Invasive Species

The Asian Carp, an invasive species of fish, may be making its way into the Chicago River. Here's a look at other species that have overstayed their welcome

2. No Liftoff: Obama's Plan Grounds NASA

President Obama's 2010 budget proposal for NASA would net the space agency $100 billion over the next five years, though none of it would go toward flying astronauts back to the moon

3. Behind Pepsi's Choice to Skip This Year's Super Bowl

Pepsi won't run a Super Bowl ad, choosing instead to focus on a social-media campaign. Can a brand now afford to skip the big game?

4. Facebook's Doppelgänger Week Is Viral Groupthink

Posting your celebrity twin is the latest ill-advised viral fad to take over the popular social-networking site

5. How to Build Your Own Bedbug Detector

Go ahead — scientists designed this so you can try it at home

6. How the Democrats Could Lose the Senate

It may be a long shot, but with recent retirements, worrisome poll numbers and the entrance of strong GOP challengers, Democrats are genuinely worried about losing control of the Senate

7. What Is Robert Gates Really Fighting For?

A trusted aide to six Presidents, Robert Gates is the most powerful Defense Secretary in a generation. But what is the Republican at the head of Obama's war room fighting for?

8. Haiti's Children: Save Them, Don't Just Take Them

While the missionaries who took the Haitian kids may have meant well, they may have been doing the children and the country a disservice — as well as breaking the law

9. What Asia Can Really Teach America

Americans are taking the wrong message from Asia's economic success. Heavy-handed state control isn't the future; increasingly, it's on the way out

10. Study: Eastern Trees in the Midst of a Growth Spurt

Two decades' worth of careful measurements of hardwood forests in Maryland show their growth has accelerated significantly over the past two decades. Is it good for global warming?

Cartoons of the Week

• Photo Essays
• Quotes of the Day
• Special Reports
• TIME Blogs

Table of Contents

• Robert Gates: The Survivor
• Handicapping the Best Picture Oscar
• Divorcing While Dying
• Heidi Montag, Spencer Pratt and the Limits of Celebrity
• How to Tame The Deficit
• Gift Giving on Facebook Gets Real