HOUSTON—Though quite small, curious seasonal variations in concentrations of oxygen (O2) in the thin atmosphere above the floor of the nearly 100-mi.-wide Gale Crater and ancient lake bed on Mars have scientists baffled and striving to provide an explanation. NASA’s Curiosity rover, which touched down in August 2012, has been analyzing the average annual composition of the Martian atmosphere as part of its exploration agenda for nearly six years with a portable chemistry lab ...


Register now for free access to "Mars Oxygen Variations Baffling Scientists" and other premium content selected daily by our editors. 


Current magazine subscribers: digital access to articles associated with your subscription are now included at no added charge to you. Simply use your subscriber email to log in to your account (or contact us for assistance in updating your account).
Current Aviation Week Intelligence Network (AWIN) enterprise and individual members: please go to http://awin.aviationweek.com for access.


Already registered? Log in here here.