Gerald P Murphy masthead


The Old Grey Muzzle Tour 2015 — a 68-day, cross-country scientific expedition
    by Dr. David J. Waters to study 14 of the oldest-living Rottweilers in the U.S.
    in their homes. The trek begins in Cocoa Beach, Florida on March 9.
    Click to Read More

Dr. Waters' Muzzle Tour Journal — After visiting and studying each exceptionally
    long-lived Rottweiler, Dr. Waters takes time to reflect and write about
    what this particular dog has taught him about the aging process, his own
    thought process ... and beyond. Click to Read More

The Old Grey Muzzle Tour Healthy Longevity Notebook was created
    for those people who donate their financial support to the Murphy Foundation’s
    work using the oldest dogs as our greatest teachers to uncover the secrets of
    successful aging and cancer avoidance.
    Click here to learn more about the Healthy Longevity Notebook.

                               Cool Dogs, Cool Science Featured at TEDx!!!
On April 12, 2013, The Old Grey Muzzle Tour 2013 finished center stage with Dr. Waters’ TEDx talk.
Dr. Waters was joined at the sold-out event by 20 other speakers to showcase creative progress and ingenuity. Dr. Waters captured the imagination of the audience by weaving together his personal experience in the process of scientific discovery with how language can limit the scientific method and impede our progress. Watch Dr. Waters’ inspirational performance – “The Oldest Dogs as Our Greatest Teachers: Get the Words Out of Your Eyes”. Click the video below to watch the talk.


    Leave feedback about the talk on TEDx website

    Click to Read More about TED

    Click to Read More about TEDx



• The Healthy
Longevity Notebook
(Support our work and receive your copy)

• The 2015 Old Grey Muzzle Tour
(Welcome Letter)

• Read Your Selenium Intake, Your Prostate,
and "U"
Featured by UroToday

• 2014 Foundation
Update Newsletter

• Featured Books:
Dr. Waters' Corner


• Ovaries & Aging
in Aging Cell (PDF)

• Longevity and Reproduction (PDF)

• The Perils of Dichotomous Binning
in Theriogenology

• Spay as Strategic Disturbance (PDF)

• Caught in an Act
of Convenience

• Longevity in Dogs: Understanding What's Missing (PDF)

• Your Selenium Intake,
Your Prostate and U

• Optimal Selenium Dose for Prostate Cancer Risk Reduction in Dose-Response (PDF)

• Selenium Level, Prostate Cancer Risk, and DNA Damage
in Carcinogenesis (PDF)

• Prostatic Response
to Two Forms of Selenium

• Homeostatic House-
cleaning Effect of Selenium

in BioFactors (PDF)

• Self-Renewal of Teachers (PDF)

• The Paradox of Tethering: Creative Excellence (PDF)


• Watch The 2010 Old Grey Muzzle Tour on GMA Weekend

• Read USA Today's Coverage of the 2010 Old Grey Muzzle Tour

• Cancer Clues from Pet Dogs in Scientific American. (PDF)

• Read the Story About Our Ovaries–Longevity Research as Featured by

• The Healthy Aging Corner