How do groundhogs hibernate, and how does hibernation differ from other types of torpor? And Phil, the famous Pennsylvania groundhog, goes into hibernation?
How and why do nightingales sing? How do they compete with that of other nightingales, and with other songbirds? And what can we learn from the opera The Song of the Nightingale?
Danni Büchner is invited to Sam Dylan's Halloween party. But the "Goodbye Germany" emigrant has no desire for many other party guests. And find clear words.