Kryotherium

These are a group of giraffe descendants. They include the largest land mammals ever, at 20 feet tall at the shoulder, 32 feet long and almost a 3 tonnes. The only reason they survived the 3010 mass extinction is because giraffes became drastically smaller due to the decrease in acacia populations (pollution, deforestation). They became small almost rodent like creatures just before the extinction die to human experimentation. Millions of years later, their Chalicothere like descendants swam to other continents, or walked. One group became giraffe like, but with shorter front limbs. The others became predators.


* the first species doesn't appear until 42 myac (million years after Christ)