How researchers measure the logical reasoning of monkeys, pigeons, rats, fish and wasps shapes how they understand mental processes in animals and in people.
White Americans, especially older citizens, tend to be more bothered than Black Americans or Latinos by demonstrators waving Mexican flags - and even US flags - during protests.
Adriana Smith's body was kept on life support for 16 weeks so her fetus could gestate. Abortion politics don't capture the ethical complexities of such situations.
Iran has a long history of enriching uranium in an effort to develop nuclear weapons. It's not clear how far the US attack set back Iran's production of bomb-grade uranium.
Democratic governors and President Donald Trump agree to fight an invasion of non-native fish that has spread up the Mississippi River and threatens the Great Lakes.