The planet's magnetic field is weakening. Scientists aren't sure why, but studying ancient jars could help them find out. The ceramics provide a remarkable window onto Earth's magnetic past.
Flynn resigned amid allegations he inappropriately talked about U.S. sanctions with a Russian official, and later allegedly misled then Vice President-elect Mike Pence about the conversations.
Many agree that most NATO countries don't pay their fair share for defense. Some countries face such economic challenges that they might not be able to meet spending goals even if they wanted to.
The U.S. Treasury is taking action against Venezuelan Vice President Tareck El Aissami, accusing him of being personally and significantly involved in the international narcotics trade.
Israeli Prime Minister Benjamin Netanyahu will pay his first visit to President Trump on Wednesday. Rachel Martin talks to former U.S. ambassador to Israel Martin Indyk about the meeting.
The Trump administration accuses Tareck El Aissami of playing a "significant role" in international narcotics trafficking. As a result of the designation, his assets in the U.S. will be frozen.
China has seen an uptick of cases of the deadly H7N9 strain of the avian flu virus, and authorities are trying to stop it from spreading further. Some areas are closing live poultry markets.