How scientists proved horses really can smell fear

Today on CNN10: We'll get an update on the emergency return to Earth for four astronauts aboard the International Space Station. Then, we'll unpack a new study by scientists that proves horses really can smell fear. Plus, we'll see how one trailblazing Olympian is helping forge a new generation of female fencers. All this and more on today's CNN10! Learn more about your ad choices. Visit podcastchoices.com/adchoices