The term 'iron horse' was a nickname for what type of transportation vehicle? The nicknames came from a newspaper description as follows: 'the iron horse with its lungs of brass and sinews of steel, came dashing along at a furious rate, puffing volumes of smoke and flame from its nostrils.'

Oil is measured in barrels, which is equal to 42 US gallons or 159 liters.

Venezuela leads the world with 300.9 billion barrels of oil reserves – a 17.8 per cent share of global reserves.