06/11/2026
On June 11, 1770, famous explorer James Cook ran aground on a portion of the Great Barrier Reef. His ship, HMB Endeavour, was only saved from sinking thanks to quick action by the crew. They threw 48 to 50 tons of cargo overboard (including six iron cannons), and plugged the hole in the hull using a sail.
Once high tide came, they were able to free the ship from the reef and safely beach it near modern-day Cooktown, Queensland, Australia. It took the crew seven weeks to repair Endeavour's hull, but they were able to successfully continue their journey home after that.
The coral formation Cook ran aground on is now called Endeavour Reef after his ship. The river the crew safely beached the ship on the banks of is also named Endeavour River.
If you're interested, we found this stamp in this big collection of Australia stamps: https://mysticstamp.pulse.ly/8pxgaayjd6