A lunar nuclear reactor may sound dramatic, but its neither illegal nor unprecedented. But it does raise critical questions ...

The first space race was about flags and footprints. Now, the new race is to build there, and doing so hinges on power.

The rivalry of the superpowers in space is entering a new phase, in which energy independence beyond Earth plays a key role.

The first space race was about flags and footprints. Now, decades later, landing on the Moon is old news. The new race is to build there, and doing so hinges on power.