Why mining the water on the Moon could open up space exploration
‘Water is the oil of space’
https://www.theverge.com/2018/8/23/17769034/nasa-moon-lunar-water-ice-mining-propellant-depots
NASA's Nuclear Thermal Engine Is a Blast From the Cold War Past
Nuclear thermal propulsion, which was studied in the Cold War for space travel, could make a comeback to fly humans to Mars.
https://www.popularmechanics.com/space/moon-mars/a18345717/nasa-ntp-nuclear-engines-mars/