Lucy was found by Donald Johanson and Tom Gray on November 24, 1974, at the site of Hadar in Ethiopia. They had taken a Land Rover out that day to map in another locality. After a long, hot morning of mapping and surveying for fossils, they decided to head back to the vehicle.
Alkanes are an example of saturated compounds. An unsaturated compound is a chemical compound that contains carbon-carbon double bonds or triple bonds, such as those found in alkenes or alkynes, respectively. Saturated and unsaturated compounds need not consist only of a carbon atom chain.
Definition - What does Unsaturated Hydrocarbon mean? Unsaturated Hydrocarbon is a hydrocarbon that has double or triple covalent bonds between adjoining carbon atoms. These bonds make unsaturated hydrocarbons more reactive than the saturated hydrocarbons. They have fewer hydrogen atoms bonded to carbon atoms as compared to saturated hydrocarbons. Hydrocarbons having at least one triple bond are known as alkynes and those having, at least, one double bond are known as alkenes.