wikipedia.org

6ElOY TIL there was a sign language developed in the Rennell Island by a deaf person living there, that was only used by him and his acquaintances and disappeared when he died.
WkrWX TIL a teenage runaway in WA learned to fly via internet, stole several airplanes, flew to the Bahamas, and was captured after an international manhunt
QJVAk TIL about Australian Aborigine avoidance practices; these are social distancing rules that precludes in-laws from having direct contact and a policy of not naming the deceased which can last a period of between 12 months to several years.