F5 is the strongest category of tornadoes; only about 2% of tornadoes are rated at this level.
3 points, added 9 years ago
21 points, added 8 years ago
0 points, added 7 years ago
From microscopic to Giants earth worms are beneficial
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2 points, added 8 years ago
Top Tech Science 20 items ranked
Tech Science
0 points, added 8 years ago
Favorite Theories 20 items ranked
Favorite Theories
0 points, added 8 years ago
0 points, added 3 years ago
15 points, added 10 years ago
World's Most Unusual Fish 20 items ranked
0 points, added 7 years ago