请调整浏览器窗口大小或者请使用手机查看!
Birds do it; bees do it, butterflies, bats and eels do it—all leave one habitat to migrate to another, often thousands of miles away. NOVA penetrates the mystery of where animals migrate, why and how they get there.
Could there be life beyond Earth? Only recently has it become possible to scan the skies in a systematic attempt to find out. NOVA joins the search with guest host Lily Tomlin.
NOVA dips into the sad plight of our coastal waters, where toxic chemicals, raw sewage and disease-carrying microbes are routinely dumped.