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.
Phenol is unsaturated; any compound containing formal C=C or triple bonds can be called unsaturated as it can be saturated by adding H2. However, in the case of phenol, it is better to call it aromatic compound as it contains aromatic phenyl C6H5 ring.