Authors:

We really kind of pioneered a technology here at Fossil Rim where we use ultrasound on both our white rhinos and black rhinos and we can even document pregnancy in animals at about 30 days.

"Texas reserve offers safari-like experience" By Stephanie Oswald, www.cnn.com. February 16, 2001.
We really kind of pioneered a technology here at Fossil Rim where we use ultrasound on both our white rhinos and black rhinos and we can even document pregnancy in animals at about 30 days.