State of the Planet

News from the Columbia Climate School

endangered species2

  • Science Nabs Illegal Ivory Sellers

    Science Nabs Illegal Ivory Sellers

    A Toronto-based company has been convicted of selling illegal ivory in the first case to use a technique for dating ivory developed by a scientist at the Lamont-Doherty Earth Observatory.

  • New Forensic Technique May Help Track Illegal Ivory

    Epic Elephant Slaughter Leads Scientists to Develop Dating Tool

  • We Can’t Separate Climate and Biodiversity

    In 1940, after Copenhagen was occupied by Nazi Germany, many of its Jews were saved when Danes and Swedes cooperated to spirit them at night across the narrow strait from the Danish town of Helsingør to the Swedish town of Helsinborg. On the Danish side of the strait, there is now a monument, lit at…

Colorful icons representing nature, sustainable living, and renewable energy with text "Earth Day 2026"

The first Earth Day in 1970 ignited a movement to stop polluting our planet. Today, our scientists and experts are tackling the most pressing challenges to achieve real-world impact. This Earth Day, join us in our commitment to realizing a just and sustainable future for our planet. Visit our Earth Day website for ideas, resources, and inspiration.

  • Science Nabs Illegal Ivory Sellers

    Science Nabs Illegal Ivory Sellers

    A Toronto-based company has been convicted of selling illegal ivory in the first case to use a technique for dating ivory developed by a scientist at the Lamont-Doherty Earth Observatory.

  • New Forensic Technique May Help Track Illegal Ivory

    Epic Elephant Slaughter Leads Scientists to Develop Dating Tool

  • We Can’t Separate Climate and Biodiversity

    In 1940, after Copenhagen was occupied by Nazi Germany, many of its Jews were saved when Danes and Swedes cooperated to spirit them at night across the narrow strait from the Danish town of Helsingør to the Swedish town of Helsinborg. On the Danish side of the strait, there is now a monument, lit at…