Why must lander probes on Mars be sterilized before launch?
A) to prevent terrestrial microbes hitching a ride on the probe and contaminating the Martian surface
B) to prevent terrestrial microbes destroying the electronics in the probe during its passage to Mars
C) to prevent Martian dust from building up on the probe on the surface
D) to prevent Martian microbes from contaminating the lander probe
Question 2
Telescopic observations of distant galaxies have shown that the universe is
A) expanding
B) contracting
C) static and unchanging
D) infinite in size
Cade and colleagues discovered a way to improve athletic performance and prevent salt and water imba
A very high-resolution texture of the planet Mars
Phobos in color by Mars Reconnaissance Orbiter - HiRISE
Ancient Oceans and Lakes on Mars
Rolling stone in Mars
All oily shop cloths should be stored in a metal container equipped with a lid to help prevent ...