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…

Blue banner with NYC background: "Columbia Climate School Class Day 2025 -- Congratulations Graduates"
  • 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…