1.
Science
; 297(5578): 78-81, 2002 Jul 05.
Article
in English
| MEDLINE
| ID: mdl-12040089
ABSTRACT
After 55 days of mapping by the High Energy Neutron Detector onboard Mars Odyssey, we found deficits of high-energy neutrons in the southern highlands and northern lowlands of Mars. These deficits indicate that hydrogen is concentrated in the subsurface. Modeling suggests that water ice-rich layers that are tens of centimeters in thickness provide one possible fit to the data.