With an 18-spot jump from last year and a 70-spot increase from the university's inaugural appearance in 2017, Arizona Online is one of the nation's fastest-rising universities in the rankings.
Researchers found that the first strain of the flu virus a person encounters during childhood sets the course for how the immune system responds to exposures later in life.
University of Arizona-led research found that trees in which isoprene production was genetically suppressed did not suffer ill effects in terms of photosynthesis or biomass production.
Oxygen loss and warming in the Southern Ocean around the Antarctic coast is much larger than predicted due to increased freshwater from melting ice sheets and increased wind.