INTERNATIONAL SPACE STATION -- Astronauts aboard the ISS can add one more mission to their list: locate a spider that has disappeared.

When Space Shuttle Endeavour took off from Kennedy Space Center this month, the crew carried two spiders with them. The spiders were sent in an enclosed box for a school science program. Students want to know if spiders can survive and makes webs in space, but now only one spider can be seen in the container.

NASA isn't sure where the spider could have gone.

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