Recently discovered in a cave in the Philippines, a species of ancient human still unknown contradicts the theory of popular evolution. It seems that homo sapiens was not the only human species still alive a few thousand years ago – this species of smaller tree climbing (homo luzonensis) dates back to 50-67,000 years ago. However, there is still a lot of mystery about them: how did they end up in Luzon, an island off the Philippines? Has the homo sapiens western-adventurer played a role in their extinction? Learn more about The Guardian.