Evidently Monsanto has known since 1981 that Glyphosates cause cancer.
Here's a teaser from the article on Mercola's web site:
"In essence, Monsanto's research of glyphosate showed similar findings as Dr. Gilles-Éric Séralini, whose damning lifetime GMO feeding study was wrongfully retracted largely due to Monsanto's influence. (Séralini's paper was later re-published with open access in the Springer Group journal Environmental Sciences Europe.
Monsanto's own research also supports the WHO's International Agency for Research on Cancer (IARC) determination that glyphosate is a Class 2 A "probable human carcinogen."--a determination Monsanto is now trying to get retracted. What's more, the research shows that lower doses of glyphosate tend to have a greater effect than higher doses, and the doses at which damage was found to occur are comparable to the glyphosate levels found in wheat, sugar, corn and soy in the American diet."