AdvertisementOpinionThe Mars Double AttackSeptember 30, 2015Marcelo GleiserfacebookEmailDark, narrow streaks on Martian slopes such as these at Hale Crater are inferred to be formed by seasonal flow of water on contemporary Mars. (NASA)
Dark, narrow streaks on Martian slopes such as these at Hale Crater are inferred to be formed by seasonal flow of water on contemporary Mars. (NASA)