old old old located sweden old originally gained fame world oldest tree inaccurate trees individual trees known live long older trees old recognized oldest living age tree determined carbon dating genetically matched plant material collected tree cause damage trunk estimated years old plant survived longer process known branch comes contact ground new root trunk dies root system alive new trunk discovery details estimated years old making world oldest known individual tree stands metres tall located sweden thousands years tree appeared formation known formation harsh extremes environment lives warming 20th century tree normal tree formation man discovered tree professor physical geography attributed growth global warming given tree nickname old late dog tree survived long visible tree relatively young older root system dates thousands years trunk tree die multiple times tree root system remains intact turn trunk trunk live years trunk dies eventually grows place winter heavy snow push tree low lying branches ground level root survive grow year process known occurs tree branch comes contact earth new roots contact point trees coast western known reproduce tree age determined dating root system found roots dating years carbon dating accurate pin exact year tree seed given estimated age tree supposed comparison invention writing beginning recorded history occur researchers found cluster spruce trees area years old previous researchers considered norway spruce species relative newcomer sweden theories tree migrated area years ago trees older years practically impossible sweden years ago area grip world wide ice age nature authorities considering putting fence tree protect possible trophy hunters access small path leading tree unmarked park rangers want encourage large groups tourists surround tree free guided tour arranged entrance tourists tree
Old Tjikko