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Flo is a 54-year old government-owned chimpanzee who has spent most of her life in a laboratory enduring painful and traumatic experiments. Hundreds of chimpanzees just like her languish in the United States. But, thanks to modern research techniques and the support of the public, the tide is beginning to turn in favor of these sensitive and intelligent animals.

Merck Makes Research Decision

Global healthcare giant Merck has shifted away from conducting or financially supporting biomedical research on chimpanzees. The company joins a growing number of pharmaceutical companies and biotech firms worldwide who support phasing out the use of chimpanzees in harmful research. Learn more »

News & Events

  • August 18, 2014

    10 Ways These Historic Chimps Are Enjoying Retirement

    Swinging on fire hoses. Basking in the sun. See the many ways these chimpanzees are enjoying retirement at Chimp Haven after years in a laboratory.

  • May 14, 2014

    People’s Choice: HSUS Video Wins Silver Telly Award

    After nearly 12,000 entries from all 50 states and numerous countries, the Telly Awards has named The Humane Society of the United States as a People’s Silver Winner.

  • January 30, 2014

    Top Pharmaceutical Company Stops Chimpanzee Use in Research

    Merck & Co, Inc., will stop conducting or financially supporting biomedical research on chimpanzees into the foreseeable future. The availability of alternatives has led to the policy change by one of the world’s largest pharmaceutical companies.

  • Chimpanzee

    November 14, 2013

    Bipartisan Chimpanzee Retirement Legislation Passes Senate, Goes to President Obama for Signature

    A barrier in the way of government-owned chimpanzees in laboratories being transferred to sanctuaries has been cleared now that Congress has given final approval to support the project. The Senate gave final approval to the National Institutes of Health to spend money on sanctuary care and to begin fulfilling the agency’s pledge to move laboratory chimpanzees to sanctuaries, a move hailed by The Humane Society of the United States as game-changing for these great apes.

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