HOUSTON, Sept 21 (Reuters) - The U.S. Coast Guard on Wednesday was investigating two oil sheens in the San Francisco Bay area, one of which is in the vicinity of a Phillips 66 refinery, the federal maritime safety agency said.

CHICAGO (Reuters) - A fungal disease called Diplodia ear rot is lurking in corn fields in portions of the U.S. Midwest, and crop experts and farmers fear lower yields and crop damage that could force growers to accept steep discounts on the cash market.

WASHINGTON (Reuters) - U.S. Republican presidential nominee Donald Trump opposes a long-planned transition of oversight of the internet's technical management from the U.S. government to a global community of stakeholders, his campaign said in a statement on Wednesday.

(Reuters) - ExxonMobil Corp. has agreed to pay $12 million to Montana and the U.S. government to restore natural resources damaged or destroyed by a pipeline rupture in 2011 that spilled oil into the Yellowstone River, according to a settlement proposed on Wednesday.

WASHINGTON (Reuters) - U.S. lawmakers on Wednesday blasted Mylan NV Chief Executive Heather Bresch for sharply increasing prices for the EpiPen emergency allergy treatment at a congressional hearing in which Republicans and Democrats questioned the reasons behind rising U.S. drug costs.

(Reuters Health) - Tobacco smoke leaves its mark on DNA by changing a chemical code on the DNA molecule that can sometimes change gene activity, according to a new study.

(Reuters Health) - A new study has confirmed what your waistband has told you all along - you gain weight during the holidays.

(Reuters Health) - Having a vasectomy doesn't increase a man's risk of developing prostate cancer or dying from it, a U.S. study suggests.

LONDON (Reuters) - The United States performs poorly in U.N. rankings on progress towards global health goals due to its high levels of violence, alcohol abuse and childhood obesity, a study has found.