Observations have allowed astronomers to put a much higher lower bound on the age of the TRAPPIST dwarf star (~5.4b years) than previously known (~500M years).

Observations have allowed astronomers to put a much higher lower bound on the age of the TRAPPIST dwarf star (~5.4b years) than previously known (~500M years). The rest is primarily conjecture about the atmospheric compositions of its planets and whether life could have evolved on them.