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Don’t have the time or money to fly to Spain to visit the famous Prado Museum in Madrid? No problem. Today, Google launches the Prado layer on Google Earth. Now you can view masterpieces like Velazquez’s The Maids of Honor or Rembrandt’s Artemis in high resolution.

If you're anything like us, you were the type of kid who took apart dad's
new radio just to see what was inside. That kind of curiosity never dies,
which is why How 2.0, PopSci's award-winning home for the coolest
tips, tricks, hacks and do-it-yourself projects, wants to see what today's
tech tinkerers are up to.

Have you built something amazing you'd like to
show off? Tried a How 2.0 project and failed miserably? Blown something up
with the kids' chemistry set? If you've invented it, tweaked it, hacked it,

A: Tagging is the act of assigning your own keywords to things online-photos, blog entries, bookmarks-so that you can easily categorize, locate, and share them in the future. One of the best examples is del.icio.us, which lets you save Web bookmarks to a page on the site instead of to a file stashed away on your computer. This way, you can access them from anywhere and let other people see what sites you like.