With 2.7 times the mass of the Sun and at an age of 700 million years, it [Vindemiatrix] has reached a stage in its evolution where the hydrogen fuel in its core is exhausted.- Cryogenian (Wikipedia)
The Cryogenian (from Ancient Greek: κρύος, romanized: krýos, meaning “cold” and γένεσις, romanized: génesis, meaning “birth”) is a geologic period that lasted from 720 to 635 million years ago. It forms the second geologic period of the Neoproterozoic Era, preceded by the Tonian Period and followed by the Ediacaran.