Scientists surveying the submerged Macquarie Ridge, which stretches from New Zealand almost to the Antarctic Circle, have discovered a water world teeming with life. Tens of millions of starfish-like creatures live on an underwater mountain dubbed "Brittlestar City," whose unique shape and location make it possible for these animals to survive in such crowded conditions.

Dept.: Gray Matter
Element: Titanium
Project: Anodizing a titanium birdhouse
Cost: $75
Time: 2 hours
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