United States Federal judges serve in their positions A) for a maximum of 10 years. ) until they turn 65 years of age until a new President replaces them for as long as they fulfill their responsibilities .

United States Federal judges serve in their positions for as long as they fulfill their responsibilities. As with U.S. Supreme Court Justices, Federal judges hold their seats until they resign, die, or are removed from office for violating the law.

c. taught scientists many new things about the earth, but not other planets.

explanation:

no because it could make the world a terrible place to live in.