"SpaceX Starship explosion likely caused by propellant leak, Elon Musk says" by @Spacecom - Fuel and oxidizer both leaking into a confined area would only need a flame or spark to explode. And "to build pressure in excess of the vent capacity" means it exploded. https://www.space.com/space-exploration/private-spaceflight/spacex-starship-explosion-likely-caused-by-propellant-leak-elon-musk-says#SpaceX#Starship🚀 #NewSpace