Some of these conditions are found on other planets. Antarctica and Mars are similar in many ways, for instance. Microbes live in the under-ice Lake Vostok at the South Pole which hasn't been exposed to air for millions of years. Maybe something similar could exist on Europa or below the surface of Mars. Just on Feb. 20 th , press release that not only water but complex carbon molecules have been found in dust clouds around stars.
Material exists to form life elsewhere.
SETI is searching for life trying to contact us.