Although that is a crazy and sick ski descent, it is definitely not
Thermogenesis. It is some random un-named line off of Liberty Ridge.
Their line == not Thermogenesis:
Thermogenesis is just out of that picture to looker's left. It is the obvious deep couloir visible in their previous image:
See the route photos on p.204 and 207 of Mount Rainier: A Climbing Guide
(2nd ed, 2005) by Mike Gauthier, which should make things quite clear.
The blog post correctly makes no mention of "Thermogenesis", so the two who skied it must know it is a different line. They should give it some cool name! Their line actually looks safer than Thermogenesis, since it is less exposed to the overhanging ice cliff and serac falls from it.