Either buy a kit, or simply follow the guidelines below. Here are the general materials you'll need: 1  8-foot (2.5-meter) long 1 Â¾-inch diameter galvanized steel poles -- four for approximately every 15 feet (4.5 meters) of batting cage length plus four for the initial frame.
Cenozoic Era. The Cenozoic Era began 65 million years ago with an asteroid impact that killed off a majority of the dinosaurs and ends at the present day.The Cenozoic is commonly divided into three periods: 1  Paleogene (65.5 to 23.03 million years ago).2  Neogene (23.03 to 2.6 million years ago).enozoic Era. The Cenozoic Era began 65 million years ago with an asteroid impact that killed off a majority of the dinosaurs and ends at the present day.
The Mesozoic Era is the name for the period of time that began about 252 million years ago and ended about 66 million years ago. This era is divided into three geologic period â¦ s: the Triassic (from 252 to 201 million years ago), the Jurassic (201 to 145 million years ago), and the Cretaceous (145 to 66 million years ago).