Ross is Monica's older brother who works at the museum looking after dinosaur
bones and similar stuff.
He has so far been the only male member of the gang to have been married,
however his wife, Carol, announced she was a lesbian and left him. She
later gave birth to their son, Ben, and married her lesbian lover, Susan.
Ross has had a crush on Rachel since high school. Rachel only found out
about this when Ross was in China, then was shattered to find he'd returned
with a new girlfriend, Julie.
Once Ross had found out that Rachel had a thing about him too, they finally
got together. He nearly threw it all away when she discovered the list
Chandler suggested he make of both Rachel and Julie's good and bad points
to help him choose between
them.
Ross's relationship with Rachel seemed to be going
fine until Rachel made friends with Mark who managed
to get her a job at Bloomindales. Ross became
jealous, convinced that Rachel and Mark were
being a little too friendly, and this led to Rachel
insisting that they took a 'break'.
During the break, Ross managed to have a one-nighter
with Chloe - the Xerox girl - which of course
Rachel got to hear about.
Despite his best efforts to apologise, Rachel continued
to give Ross the cold-shoulder. Phoebe subsequently
matched him up with the once bald Bonnie,
which in turn made Rachel jealous enough to
convince Bonnie to shave her head again.