What is one hypothesis for why the crust in the northern hemisphere of Mars is thinner and lower than that in the southern hemisphere?
A) a giant impact blasted away crust from the northern hemisphere
B) it once hosted an ocean of water which eroded away the crust
C) tectonic activity caused the southern hemisphere to rise up above the level of the northern hemisphere
D) massive marsquakes caused the northern hemisphere to subside
Question 2
Suppose it is January and the Sun remains above your horizon all day long. Where must you be located?
A) at the South Pole
B) at the North Pole
C) somewhere between the Antarctic Circle and the South Pole
D) somewhere between the Arctic Circle and the North Pole
The Peary caribou is a relatively small and pale subspecies found in the tundra of far northern Nort
Phobos transits the Sun, as seen by Mars Rover Opportunity on March 10, 2004
Martian geological features, such as the "Face on Mars", sometimes trigger facial pareidol
Lower Limbs & Pelvis
For ice massage, ice is frozen in a cylindrical container or a paper cup (A). The top half of the cu