The ancestor of tigers and snow leopards also branched off around 3.9 million years ago. The tiger then began to evolve into a unique species toward the end of the Pliocene epoch, about 3.2 million years ago.That makes the tiger and snow leopard âsister speciesâ, the researchers report in the journal Molecular Phylogenetics and Evolution.he ancestor of tigers and snow leopards also branched off around 3.9 million years ago. The tiger then began to evolve into a unique species toward the end of the Pliocene epoch, about 3.2 million years ago.
4. isolation - (psychiatry) a defense mechanism in which memory of an unacceptable act or impulse is separated from the emotion originally associated with it. psychiatry, psychological medicine, psychopathology-the branch of medicine dealing with the diagnosis and treatment of mental disorders.. isolation - (psychiatry) a defense mechanism in which memory of an unacceptable act or impulse is separated from the emotion originally associated with it. psychiatry, psychological medicine, psychopathology-the branch of medicine dealing with the diagnosis and treatment of mental disorders.
isolated adjective. âº not near other things or âpeople of the same âkind: geographically/politically/socially isolatedisolated island/village You have âbrought the âresources of the modern âworld to that isolated village.solated adjective. âº not near other things or âpeople of the same âkind: geographically/politically/socially isolatedisolated island/village You have âbrought the âresources of the modern âworld to that isolated village.