Possibly Job, Elihu, or a contemporary of Job wrote the things in Job 40:v 15-18. A peculiar thing to write about:
Job 40:15-18 NIV
 “Look at Behemoth, which I made along with you and which feeds on grass like an ox.  What strength it has in its loins, what power in the muscles of its belly!  Its tail sways like a cedar; the sinews of its thighs are close-knit.  Its bones are tubes of bronze, its limbs like rods of iron.
Just thought this would make some interesting conversation... I found it interesting that the description has an uncanny resemblance to that of a dinosaur, and this was written several thousand years ago. What do you think? Do the descriptions match with any animals we know today?