Bible translations and wild animals

Unicorns are clearly mentioned in the KJV 9 times. Why have newer versions changed it to wild ox or buffalo?

The King James Version continued the thought from the Septuagint, the Greek translation of the Old Testament, that animals mentioned in places like Numbers 23:22, Deuteronomy 33:17 and Job 39:9 were unicorns.

Newer Bible translations render the Hebrew word as a “wild ox” or buffalo-like animal because that is keeping with the context of the passages that describe a strong and ferocious animal.