Is a fossil from the Geisel Valley the first proof that crocodiles cared for their brood? How were five different crocodile species able to share a single habitat? Finds from the Geisel Valley date back to the Eocene Epoch and still hold many secrets. These secrets are attracting researchers from around the world, including Alexander Hastings. When speaking to Hastings about his work, it quickly becomes clear what has drawn the young palaeontologist from Florida to Halle, of all places.