Some 1,293 scientists sent a letter (pdf) this week to each and every U.S. senator urging them not to support any endangered species legislation that is based on politics rather than science.

“As scientists with expertise in biological systems,” the letter reads, “we are writing to urge you to vote against any legislation that would undercut the use of best available science as the basis for adding or removing any particular species from the protection of the Endangered Species Act.”

The letter, sent under the aegis of the Union of Concerned Scientists, follows recent political moves to remove the gray wolf (Canis lupis) from the endangered species list as well as other similar actions making their way through the legislative process. The document was signed by scientists from all 50 states, the District of Columbia and two U.S. territories.

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