Daniel Schrag is Professor of Earth
and Planetary Sciences at Harvard University. Schrag studies
climate and climate change over the broadest range of Earth
history. He has examined changes in ocean circulation over
the last several decades, with particular attention to El
Niño and the tropical Pacific. He has
worked on theories for Pleistocene ice-age cycles including
a better determination of ocean temperatures during the Last
Glacial Maximum, 20,000 years ago. Schrag has also developed
the Snowball Earth hypothesis, proposing that a series of global
glaciations occurred between 750 and 580 million years ago
that may have led to the evolution of multicellular animals.
Schrag is currently working on creating integrated models
of climate change and economic stability for developing countries.
Schrag came to Harvard in 1997 after teaching at Princeton,
and studying at Berkeley and Yale.
He was named a MacArthur Foundation Fellow in 2000.