Kurzgesagt - In a Nutshell Season 4 Episode release dates & where to watch

1. The Last Star in the Universe — Red Dwarfs Explained

The last star in the universe will be a red dwarf. Red dwarfs in general might be great places to look for aliens – or planets for humans to find a new home after our solar system has died.

2. Why the War on Drugs Is a Huge Failure

The war against drugs has been a terrible disaster for everybody involved. Why? And can we do something differently?

3. The Antibiotic Apocalypse Explained

What is the Antibiotic Apocalypse? What is it all about? And how dangerous is it?

4. Space Elevator — Science Fiction or the Future of Mankind?

So. Space elevators. Are they are thing that we should talk about?

5. Safe and Sorry — Terrorism & Mass Surveillance

6. How Far Can We Go? Limits of Humanity (old version)

Is there a border we will never cross? Are there places we will never be able to reach, no matter what? It turns out there are. Far, far more than you might have thought…

7. What Are You?

So. Are you your body? And if so, how exactly does this work? Lets explore lots of confusing questions.

8. What Happened Before History? Human Origins

Humans. We have been around for a while now. When we think about our past we think about ancient civilizations, the pyramids, stuff like that. But this is only a tiny, tiny part of our history.

9. Death From Space — Gamma-Ray Bursts Explained

There are cosmic snipers firing at random into the unvierse. What are they and what happens if they hit us?

10. Genetic Engineering Will Change Everything Forever — CRISPR

Designer babies, the end of diseases, genetically modified humans that never age. Outrageous things that used to be science fiction are suddenly becoming reality. The only thing we know for sure is that things will change irreversibly.

11. Genetic Engineering and Diseases — Gene Drive & Malaria

We have the choice to attack one of our oldest enemies with genetic engineering. But should we do it?

12. The Most Efficient Way to Destroy the Universe — False Vacuum

What if there is a way to destroy the universe so fundamentally that life as we know it will be impossible forever?

13. Fusion Energy Explained — Future or Failure

How does fusion energy work and is it a good idea?

14. The Most Gruesome Parasites — Neglected Tropical Diseases (NTDs)

There are a group of parasites extremely disgusting and mean. Humanity declared war on them.

15. A New History for Humanity — The Human Era

It is time to reframe how we think about our past. We need a new year 0 for humanity. But which one should we choose and why?

16. Overpopulation — The Human Explosion Explained Finale

In a very short amount of time the human population exploded and is still growing very fast. Will this lead to the end of our civilization?