Jim Harbaugh has a busy offseason ahead of him. Here's what to know about his heart condition, cardiac ablations and recovery time. The rising rate of colon cancer in young people can't be caused by diet alone, doctors say. Microplastics, sleep, and antibiotics may play a role.

U.S. Postal Service (USPS) workers will no longer deliver UPS SurePost packages after the government agency's contract with the parcel service expired this year. The International Brotherhood of Teamsters, a union representing UPS delivery drivers, confirmed the negotiated service agreement's expiration in a Facebook post last week.

UPS recently ended a contract with the United States Postal Service and delivery changes are coming to some post office box users as a result.