original: This split the tigers into two groups which then went on to develop independently.
simplifications: This split the tigers into two separately developing groups. This separated tigers and they developed independently in two groups. The tigers split into two groups and then developed independently. This split the tigers into two groups. They went on to develop independently. This split the tigers into two groups. Then they developed independently. This split the tigers into two groups that developed independently. This split the tigers into two groups. These groups went on to develop independently. This cut the tigers into 2 groups which went on to grow alone. The tigers split in to two groups and then developed independently. This divided the tigers into two groups, which then developed independently.