Biologist calls for protection and more studies of natural time capsules of climate change

Packrats, also known as woodrats, are the original hoarders, collecting materials from their environment to make their nests, called middens. In deserts throughout western North America, for instance, packrat middens can preserve plants, insects, bones and other specimens for more than 50,000 years, offering scientists a snapshot into the past. Packrats, also known as woodrats, are the original hoarders, collecting materials from their environment to make their nests, called middens. In deserts throughout western North America, for instance, packrat middens can preserve plants, insects, bones and other specimens for more than 50,000 years, offering scientists a snapshot into the past. Evolution Ecology Phys.org – latest science and technology news stories