The experiment involved 20 female mice aged from 16 to 32 weeks.
April 15, 2019 at 11:40
NASA experts comprehensively evaluate the effects of space on living organisms. In addition to people, the experiments involved laboratory mice. 2017 implemented Rodent Research (“Research rodent”), in which 20 female mice sent into space in a special cage. Now the results of the study.
First of all, the specialists were interested in the behavior of rodents in microgravity: this shows you how a living organism adapts to an atypical environment, how to change circadian rhythms, physical activity, nutrition, water consumption and social interaction.
All participants successfully passed the test and remained healthy. They were at the station from 17 to 33 days (time calculated depending on the age of the specimens and correlated with duration missions of astronauts in combination with the person’s age). The Land has remained a control group of rodents.
During the first week of tests in mice showed the normal behavior: neither the appetite nor the day, neither body weight nor other indicators are not substantially changed. But after 7 days, some animals did respond to the new conditions. Most young mouse suddenly started to move around the oval trajectory – scientists call this behavior “racing”, comparing it with racing motorcycle in a confined space. By the tenth day of the experiment, a desire to run gripped the entire group.
The reason for this behavior is unclear: it may be a response to stress, and excess energy, in which the body requires more physical activity. It is also possible that the mouse wanted to stimulate the inner ear, which in microgravity due to improper distribution of the body fluid disturbed. No definitive explanation, and the investigation will continue, but in any case, the experiment demonstrated the ability of animals to adapt, while maintaining health.