Answer: The given statement "In the 1990s the Magellan spacecraft mapped over 90% of the surface of Mars for the first time ever" is False.
Step-by-step explanation:
The statement is not accurate. The Magellan spacecraft actually mapped over 90% of the surface of Venus, not Mars, for the first time in the 1990s. Magellan was a NASA mission that launched in 1989 and arrived at Venus in 1990. It used radar to penetrate Venus' thick atmosphere and create high-resolution images of the planet's surface.
Although there have been various missions to Mars, such as the Mars Global Surveyor and Mars Reconnaissance Orbiter, Magellan was not one of them. Its mission was solely focused on Venus and its surface mapping. Therefore, the statement claiming that Magellan mapped over 90% of the surface of Mars in the 1990s is false.