( August 15, 2025, 8:57 AM EDT) -- SAN FRANCISCO — A Ninth Circuit U.S. Court of Appeals panel has affirmed a lower court ruling that excluded a plaintiff couple’s expert in a cancer lawsuit against Monsanto Co. related to exposure to the herbicide Roundup, ruling that the district court correctly determined that the expert’s opinion was not based on sufficient facts or data as required by Federal Rule of Evidence 702(b)....