Why did the hindenburg explode?
The Hindenburg used hydrogen gas to make it float. Normally hydrogen is not really explosive unless it is mixed with oxygen. No one really knows the cause of the fire on board the Hindenburg however, during the landing, hydrogen is released, the hydrogen then mixes with the oxygen in the air and becomes highly explosive. The flames could have ignited the vetting hydrogen/oxygen mixture and caused the Hindenburg to explode.
