>> axelrod: hard to believe, perhaps, but it was 50 years ago today the that capitol records released "i wanna hold your hand." it would become the first beatles hit in the u.s. in three days, a quarter million copies were sold. the latest trend in literature takes us to the chicken coop. that's next. he energy in one gas is also enough to keep your smartphone running for how long? 30 days? 300 days? 3,000 days? the answer is... 3,000 days. because of gasoline's high energy density, your car doesn't have to carry as much fuel compared to other energy sources. take the energy quiz. energy lives here.