makes no sense at all.
All evolution on this planet as it exists now cannot take place in 105,000 years.
You make too many assumptions. An ice age doesn't kill everything. Lots of creatures survive just fine in the central tropical area of the earth. You also leave out the possiblity that everything on this earth evolved "de novo". Some may have been "planted" here. Human mitochondrial DNA appears to have a common ancestor that can not be much over 250,000 years old. The Toba volcano appears to have reduced the human population down to around 5,000 individuals. That was around 70,000 years ago.