Marah Hardt

Marah J. Hardt is a research fellow with the Blue Ocean Institute. Her background is in coral reef ecology and the history of science.

Recent Articles

Carbon Dioxide: The Curse of the Deep

Ocean warming, acidification, and corrosion wreak havoc on marine populations.

I was 8 years old, diving down in the waters off Cape Cod, when I first saw a strange shimmering within the sea. About 7 feet beneath the surface, I cautiously extended my hand to where the water appeared blurry, as if I were gazing down through a thick, melting pane of glass. My fingertips struck very cold water. I had encountered a thermocline, literally a line of temperature, and discovered that the ocean is far from a uniform pool of blue.