The Good Earth

There are about 675 species of native birds in North America.  To win the most demanding and prestigious birdwatching competition in the country you have to see ALL of them.  And then some.  In this hour of To the Best of Our Knowledge, die-hard birders compete in “The Big Year.”  Also, we’ll get the dirt on the gardener’s best friend: the worm, from the nightcrawler in your backyard to the Australian worm that shakes the ground you stand on.