Life on Mars:
a) is still a topic under study.
b) was once there but is extinct now.
c) was proven by a meteorite from Mars.
d) is well known but not much discussed.
e) probably came from Earth to Mars after Mars oceans dried up.
Answer: A
Life on Mars:
a) is still a topic under study.
b) was once there but is extinct now.
c) was proven by a meteorite from Mars.
d) is well known but not much discussed.
e) probably came from Earth to Mars after Mars oceans dried up.
Answer: A