cyanobacteria Archives - State of the Planet

In a Vast Ocean, Studying Impact of the Tiniest Creatures

Vast portions of the oceans contain low levels of the nutrients that normally sustain life. Yet these areas are not devoid of life. Once thought to be biological deserts, recent research has shown that such nutrient-poor marine systems could significantly contribute to the amount of carbon dioxide that is trapped into the deep ocean, influencing Earth’s climate.

by |March 3, 2016
David Walker leads students and colleagues on a geology tour of Columbia University.

Seeing Red: The Great Oxygenation Event

In Part 4 of the Columbia Geology Tour, David Walker of the Lamont-Doherty Earth Observatory explores the source of the red sandstone of Russell Hall at the Columbia Teachers College on 120th Street.

by |October 6, 2014