The video is a discussion show where the host, Lucas Marques, answers questions about various topics. The first question asked by a viewer is about the number of planets in the universe and which one is most similar to Earth. Marques explains that in December 2012, NASA found more than 18,000 planets, a significant number considering the vastness of the universe. He then introduces the exoplanet Kepler-452 b, which is similar to Earth and located in a habitable area of space. Marques also discusses the levels of radiation in everyday objects, such as electronics and microwaves, which are generally very low and pose no significant health risk. Another question asked is about the person who killed the most people in the world, with the answer being Mao Tse Tung, who was responsible for the deaths of approximately 77 million people. Marques also discusses the most dangerous place in the world, stating that it's the Valley of Death in the United States due to its extreme heat. Lastly, he talks about the most dangerous city in the world, which is São Pedro Sula in Honduras, with an average of 169 homicides per 100,000 inhabitants.
1. The most radioactive object at home is not specified in the text.
2. The number of planets in the universe is estimated to be over 18,000.
3. There are more than 200 billion planets in our galaxy.
4. There are approximately minus 2 trillion galaxies in the observable universe.
5. The most similar planet to Earth is Clapper 452 b, announced on July 23, 2015.
6. Clapper 452 b is 60% larger than Earth and is located in a habitable area of space.
7. The planet Clapper 452 b is 1,400 light years away from Earth.
8. The most dangerous place in the world is the Valley of Death located in the United States.
9. The Valley of Death reaches temperatures of 57 degrees Celsius.
10. The most dangerous city in the world is São Pedro Sula in Honduras, with an average of 169 homicides per 100,000 inhabitants.
11. The most dangerous city in Brazil in terms of violent deaths is Fortaleza, with 77.3 deaths for each 100,000 inhabitants.