Biosphere 2 hosted just two "sealed-in" crews, both during the 1990s.
This episode of Ungeniused is sponsored by:52: Area 51
51: Toilet Paper Orientation
50: Pez
49: Death by Coconut
48: The Boeing 2707: America’s Answer to Concorde
47: The New England Vampire Panic
46: The Presidential State Car
45: Valentine's Day
44: The Great Pacific Garbage Patch and Friendly Floatees
43: Emoji
42: Helicopter Prison Escapes
41: Y2K
40: Film and Television Accidents
39: The Max Headroom Broadcast Signal Intrusion
38: The World’s Longest-Lasting Light Bulbs
37: Small Animal Racing
36: The Collyer Brothers
35: The SS Eastland
34: Project Pluto
33: The Yellow Fleet
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