The word of the day today is not even really a word, but it’s THAT important that it gets to be featured. RuBisCo is short for “Ribulose Bisphosphate Carboxylase/Oxygenase.” If you think that’s a mouthful, wait until you find out how important it is. RuBisCo is a special kind of protein called an ENZYME. It has the critical job of allowing plants to make sugars and starches from the carbon dioxide IN THE AIR! How awesome! Life as we know it would not exist without RuBisCo.