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
Sunda Clouded Leopard in lower Kinabatangan River, eastern Sabah, Malaysia
Rover exposes silica-rich dust on Mars
Vertebral compression Fractures of the spine (vertebra) can cause severe ”band-like” pain that radia
Uranus's southern hemisphere in approximate natural colour (left) and in shorter wavelengths (r
The lower intake manifold attaches to the cylinder heads.
Pitting edema of the lower extremities