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  • On July 21, 2012, Cleo, a zebra jumping spider (Salticus scenicus), and Neffi, a Johnson jumping spider (Phidippus johnsoni), blasted off on board the Japanese robotic cargo ship HTV-3 for a mission to the International Space Station. (© NASA)

    On July 21, 2012, Cleo, a zebra jumping spider (Salticus scenicus), and Neffi, a Johnson jumping spider (Phidippus johnsoni), blasted off on board the Japanese robotic cargo ship HTV-3 for a mission to the International Space Station. (© NASA)

  • Neffi, a Johnson jumping spider, before she entered the habitat. (© BioServe)

    Neffi, a Johnson jumping spider, before she entered the habitat. (© BioServe)

  • Cleo, a zebra jumping spider, in the habitat. (© BioServe)

    Cleo, a zebra jumping spider, in the habitat. (© BioServe)

  • The astronaut who tended the spiders, Sunita Williams, became quite fond of her eight-legged traveling companions. (© NASA)

    The astronaut who tended the spiders, Sunita Williams, became quite fond of her eight-legged traveling companions. (© NASA)

  • Astronauts Sunita Williams and Akihiko Hoshide examine the spiders in their habitat on the board the International Space Station. (© NASA)

    Astronauts Sunita Williams and Akihiko Hoshide examine the spiders in their habitat on the board the International Space Station. (© NASA)

  • Cleo (pictured center) and Neffi lived in a habitat stocked with water and fruit flies. Both survived the 99-day flight in near-zero gravity by learning to lunge rather than jump on their prey. Cleo died during the return flight and is now part of the Museum's zoology collections. Neffi died back on Earth and is housed at the Smithsonian. (© BioServe)

    Cleo (pictured center) and Neffi lived in a habitat stocked with water and fruit flies. Both survived the 99-day flight in near-zero gravity by learning to lunge rather than jump on their prey. Cleo died during the return flight and is now part of the Museum's zoology collections. Neffi died back on Earth and is housed at the Smithsonian. (© BioServe)

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