A group of geckos sent to space so that scientists could study the mating habits of lizards in weightlessness have died.
Scientist discovered that the small reptiles didn't survive their outer space trek after the Russian satellite housing them landed back on Earth this weekend. Researchers still aren't sure when or how the intrepid space geckos died, according to a statement released by Roscosmos, Russia's space agency, on Monday (Sept. 1).
Although the five geckos didn't survive the trip, the Foton spacecraft kept a group of flies alive for the duration of the 1.5-month space journey.
"After extraction of biological objects from the lander to carry out the initial evaluation, it was found that the fly Drosophila moved spaceflight well, successfully developed and bred," according to a translated version of the Roscosmos statement.
The Foton carrying the geckos — and other experiments — launched to space on July 18. Shortly after the satellite made it to orbit, officials found that the craft wasn't responding to commands from the ground. Mission controllers re-established contact with the animal-filled spacecraft a few days after losing touch with it.
The geckos got a lot of attention during their time in orbit. Comedian John Oliver even launched a "#GoGetThoseGeckos" campaign on his show "Last Week Tonight" to stage a rescue for the lizards. "Star Trek's" Sir Patrick Stewart, Apollo 11 astronaut Buzz Aldrin and other famous stars lent their support to the mock campaign as well.
"Maybe, just maybe, if we could come together and accomplish one thing as a civilization, we could then build on that progress," Oliver said during a broadcast in July. "And I think rescuing these space sex geckos might just be that thing. And that is why, I'm issuing a challenge to humanity: Go get those geckos."
This wasn't the first experiment launched to study animal sex in space. Scientists have sent frogs, mice and salamanders into orbit to learn more about how they do the deed in weightlessness. In 1994, Japanese killifish became the first vertebrates to reproduce in outer space.