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Guide Index

Big Picture

Echoes in the Night

Rat Soup

Bee Lines

Champion Chompers

Bridge That Changed the World

Viewer Challenge
in the classroom

Viewer Challenge Quiz

Here are the answers to the Scientific American Frontiers Show 801: Expedition Panama Viewer Challenge:

  1. d

  2. Bats make sounds at frequencies higher than humans can hear

  3. Island created when dam built and area flooded to make canal

  4. b, c

  5. b

  6. Series of buzzes and a dance

  7. c

  8. Oceans separated, Caribbean became warmer, new environments created and species evolved, Gulf Stream formed, Europe warmed, evolutionary pressure on early humans

  9. 20%

  10. c


Scientific American Frontiers
Fall 1990 to Spring 2000
Sponsored by GTE Corporation,
now a part of Verizon Communications Inc.