A physics and astronomy professor whose specializations include cosmology, 60-year-old Gleiser was born in Rio de Janeiro, and has been in the United States since 1986.
An agnostic, he doesn't believe in God -- but refuses to write off the possibility of God's existence completely.
"Atheism is inconsistent with the scientific method," Gleiser told AFP Monday from Dartmouth College, the New Hampshire university where he has taught since 1991.
"Atheism is a belief in non-belief. So you categorically deny something you have no evidence against."...