July 25, 2018
This May 12, 2016 image provided by NASA shows the planet Mars. A study published Wednesday, July 25, 2018 in the journal Science suggests a huge lake of salty water appears to be buried deep in Mars, raising the possibility of finding life on the red planet. (NASA/ESA/Hubble Heritage Team - STScI/AURA, J. Bell - ASU, M. Wolff - Space Science Institute via AP)