Whether Martian life has ever existed is still unknown. No compelling evidence for it has been found. When Curiosity landed in Mars' Gale Crater in 2012, the mission's main goal was to determine whether the area ever offered a habitable environment, which has since been confirmed. "We detected borates in a crater on Mars that's 3.8 billion years old, younger than the likely formation of life on Earth," said Patrick Gasda, a postdoctoral researcher at Los Alamos National Laboratory. "Essentially, this tells us that the conditions from which life could have potentially grown may have existed on ancient Mars, independent from Earth."