The video features two hosts, Lucas and Daniel, who answer questions from their audience. They discuss the following topics:
1. **How long a person can go without food**: The hosts explain that the time a person can survive without food depends on their fat reserves, climate, and other factors. In extreme cases, a person can survive for up to 40 days without food.
2. **New elements in the universe**: The hosts mention that there may be hundreds or thousands of elements in the universe that are not yet discovered. They also discuss the discovery of four new elements in 2016.
3. **What would happen if all the water on Earth was fresh**: The hosts explain that if all the water on Earth was fresh, the planet would be vastly different. The oceans would have a different color, marine species would not exist, and the climate would change.
4. **The closest black hole to Earth**: The hosts discuss the closest black hole to Earth, V616 Monocerotis, which is approximately 3,000 light-years away. They also explain that black holes have a strong gravitational force that can distort time and space.
5. **What would happen if Earth entered a black hole**: The hosts explain that if Earth entered a black hole, the planet would be destroyed, and time would distort. However, before that happens, the radiation emitted by the black hole would likely affect Earth.
6. **The amount of water on Earth**: The hosts mention that Earth has approximately 1.386 quintillion liters of water, with only 2% of it being drinkable.
Throughout the video, the hosts encourage their audience to ask questions and provide answers to various topics.
Here are the key facts extracted from the text:
1. A person can go up to 40 days without eating, but this depends on various factors such as fat reserves and climate.
2. The time a person can go without eating is directly linked to their fat reserves.
3. A person with more fat reserves would last longer without eating.
4. The climate can influence how long a person can go without eating, with heat causing dehydration and cold causing the body to burn fat reserves to stay warm.
5. If all the water on Earth was fresh, the planet's climate would change, and the oceans would be very different.
6. Many marine species would not exist if the oceans were fresh, and the color of the oceans would be different, more like a river tone.
7. Fresh water freezes faster than salt water, which would cause more glaciers to appear and potentially make the world colder.
8. The closest known black hole to Earth is V616 Monocerotis, located about 3,000 light years away.
9. The mass of this black hole is between 9 and 13 times the mass of the sun.
10. If the Earth entered a black hole, it would be destroyed, but before that, our time could distort, and it would take us a little longer to realize what was happening.
11. The Earth has approximately 261 quintillion liters of water.
12. Only 2% of the Earth's water is drinkable.
13. Approximately 70% of the Earth's surface is covered by water.
14. The weight of the Earth's water is approximately 6.6 million trillion tons.