This is a transcript of a video where two people are competing to build the safest house in Minecraft. One of them is the father and the other is the son. They try to prank each other with traps, explosions, and insults. The father's house is surrounded by lava and has a drawbridge, a secret safe, and a bathroom with a bomb. The son's house has a cellar with a trapdoor, an elevator made of air, and a bedroom with spiders. The father wins the challenge by killing the son with TNT while he sleeps.
Here are the key facts extracted from the text:
1. A Korean nuclear fusion reactor achieved 100 million°C for 30 seconds.
2. The experiment demonstrated that nuclear fusion is moving from a physics problem to an engineering one.
3. The temperature achieved is nearly seven times hotter than the core of the Sun.
4. The core of the Sun has a temperature of close to 15.7 million Kelvin.
5. The surface temperature of the Sun is approximately 5800 K.
Please note that these facts are based on the snippets provided and should be verified for accuracy with full articles or scientific reports.