True or false? Of all the rocky planets, Mercury is the one humans are most likely to colonize.

That's false. There are two major problems with Mercury:

1). Being the planet closest to the sun, it's not surprising that the temperature on the lighted side is excessive and hard to deal with. AND, since the planet does rotate, any place we might choose to settle there would be illuminated by the sun sooner or later.

2). Mercury is so deep inside the solar system that it takes huge, expensive amounts of energy for us to send anything there ... about as much as it takes to send a spacecraft outward to Saturn!

FALSE:

Out of all the rocky planets, Mercury is NOT the one humans are most likely to colonize.

The rocky planets include: Mercury, Venus, Earth, and Mars.

Replacing Mercury with MARS will make the statement true; we are already exploring Mars and scientists are studying Mars about possible human colonization.