article_snippet: Expedition 42 also tested the Cloud-Aerosol Transport System (CATS), which provides data to improve scientists' understanding of the structure and evolution of Earth's atmosphere.
article_snippet: This may lead to enhancements to spacecraft launches, landings and communications systems; help guide future atmospheric investigations of Mars, Jupiter or other worlds; and help researchers model and predict climate changes on Earth.
article_snippet: Dragon returned to Earth in February with critical science samples.