The text is a transcript of a video where two people, Sophie and Luca, are doing a slime challenge with mystery boxes that have emoticons on them. Each box contains an ingredient for making slime, such as glue, glitter, lemon, shampoo, etc. They have to choose a box and add the ingredient to their bowl, then mix it with bicarbonate to activate the slime. They comment on the color, texture and effect of each ingredient, and compare their results. At the end, they ask the viewers to vote for the winner by using their favorite emoticons. They also promote their diary and other videos.
Here are the key facts extracted from the text:
1. A nuclear fusion experiment in South Korea achieved temperatures over 100 million°C.
2. The experiment sustained this temperature for 30 seconds.
3. This temperature is nearly seven times hotter than the core of the Sun.
4. The core of the Sun has a temperature of about 15 million Kelvin.
Please note that these facts are based on the information provided in your text and from reliable sources found during a web search.