Air travel has been the focus of much scrutiny lately due to its devastating effects on the environment. How will the aircraft of the future address this problem?

What sounds like a distant vision of the future is already possible today – at least when it comes to technology. Will quadcopters and "soulless" unmanned aircraft soon be transporting hundreds of passengers over long distances?

Freaked out by the idea of a pilotless plane? How about one without any moving parts at all – no turbines, no propellers? The next generation of aircraft could involve ion propulsion, which allows planes to take off and land anywhere – all without making a sound.

For Chief Inspector Frank Elling, it's a relatively normal morning. But a strange case awaits him, involving a break-in, dead man, an old acquaintance, and a missing list.

Elling arrives at the crime scene. The criminal police investigators exchange initial observations, clues, and theories about how the crime unfolded.

At the gruesome crime scene, the investigators find clues regarding the murder's motive, including something very disturbing about the victim.

Lona tries to learn more about the victim and how the body was discovered, and Elling learns that his wife couldn't have met with her intern that day, as according to a colleague, he was sick.

Susanne Elling comes home unsuspectingly and is puzzled by the guests in her living room. She must have forgotten something...
In the nursing home, Mr. Dreyer is wheeled out onto the terrace. After his caregiver has gone back inside, the murderer strikes again.

During the garden party, Elling's daughter asks her father if something has changed in her parents' relationship. A little later, Elling is called to a new crime scene and, together with Lona, he makes initial assumptions about the perpetrator and motive.

Humans and animals often form their own special kinds of bonds. Here, you’ll learn about people who developed friendships with a crow, a shark, a goose, and more!

Can you imagine having a raccoon as a pet, a tiger as a playmate, or a crocodile as a friend for life? What about a reunion with a lioness? Watch this video for more accounts of wild animals who have formed bonds with people.

We imagine to sharks to be big, scary, and full of serrated teeth – but some species are actually harmless! Learn more about the friendly giants in this video.

Dolphins, sea lions, and beluga whales – which marine mammals are the friendliest?

More friendly marine animals! Here, we meet the charismatic mola mola, the cute but often aggressive sea otter, and the pack-oriented orca.

What are the top three friendliest sea creatures? We won’t give the answer away, but you can find out more in this video!