Indonesia’s mountains unveil a ‘Lost World’ | IndyStar.com Oh, man! I love me some golden-mantled tree kangaroos! I want one for Christmas! JAKARTA, Indonesia — Soon after scientists landed by helicopter in the mist-shrouded mountains of a remote Indonesian province, they stumbled on a primitive egg-laying mammal that allowed itself to be picked up and brought to their field camp. Among the things discovered by scientists in Indonesia’s remote Foja mountain range: Long-beaked Echidna: The largest species of the egg-laying group of primitive mammals called the Monotremes, seen three times during the monthlong expedition. The enigmatic creature has never reproduced…