Why is Levine interested in the dinosaurs or simply why does he want to find Site B?

Levine is a paleontologist. When he hears about the rumors and decides that the islands around Costa Rica may be harboring what is known to scientists as a lost world. The lost world hypothesis is a scientific idea that some dinosaurs may still exist today in an isolated, undeveloped part of the world. Levine is intent on studying this potential lost world.

In the beginning, Levine convinces Malcolm to join him on what promises to be a dangerous expedition. They then locate Site B, which is discovered to be located
on Isla Sorna off the Costa Rican coast. Levine then allows his eagerness to
overcome his common sense and rushes off to Isla Sorna accompanied only by a Costa Rican guide, Diego.