Wilkins Ice Shelf breaking awayFeb. 28, 1780: A massive earthquake strikes Tabriz, Iran, killing an estimated 200,000 people.

Feb. 28, 1980: Hawaiian environmentalist Dexter Cate paddles into a cove at Iki Island, Japan and frees between 200 and 300 dolphins netted for slaughter as pet food and fertilizer. He is later arrested. "Those fishermen were there merely to do a job," Cate tells People Magazine. "They didn't consider it murder, but I did. I knew I had to do something."

Feb. 28, 2008: Scientists confirm the collapse of the Wilkins Ice Shelf in Antarctica. A 160 square mile section, about eight times the size of Manhattan Island, breaks free (at right).

Photo: ZUMA Press

This feature is compiled by Peter Dykstra, an MNN contributor and publisher of Environmental Health News and The Daily Climate.