UC Berkeley professor Tyrone Hayes discovered that atrazine — used on more than half of US corn crops — caused male frogs to develop ovaries and even become functional females. Syngenta launched a multi-year campaign to discredit him. Internal documents from 2005 (released in a 2014 lawsuit) revealed Syngenta conspired to get journals to retract his work, investigated his funding and private life, filed ethics complaints with Berkeley, sent representatives to monitor his talks, and released 100+ pages of his personal emails.