Key insights

• ⚫️ Black holes can create infinite universes
• ⭐ Larger black holes are less dense
• 🌌 IRAS 20100−4156 is 3.8 billion suns in mass but as wide as a solar system
• ⏳ Inside a black hole, space and time switch roles
• 🔳 Singularity inside a black hole crushes everything with infinite gravity and energy
• ⚛️ Speculative nature and lack of testability of cyclic universe theories
• 🔍 Introduction of the Guide to Curiosity by Kurzgesagt
• 💡 Supporting the channel by purchasing products

Q&A

• What is the Guide to Curiosity introduced by Kurzgesagt?

  Introduction of the Guide to Curiosity, an interactive adventure to awaken curiosity and support the channel.

• What potential effects could cyclic universes have on the creation of different types of universes?

  Cyclic universes could have variations in physical laws and conditions. Universes favoring the production of black holes may become more common, potentially leading to conditions favorable for life. However, these ideas are speculative and not testable.

• What happens to the singularity inside a black hole?

  The singularity crushes everything inside a black hole with infinite gravity and energy. A Big Crunch may lead to a Big Bounce, creating a new universe inside a black hole. This could be part of a cycle of black holes creating new universes.

• What happens inside a black hole?

  Inside a black hole, space and time switch roles, with space being infinite and time being finite. Eventually, the entire universe inside the black hole collapses into a singularity in the future.

• What is the potential of creating a black hole from the observable universe's mass?

  The observable universe's mass is enough to create a black hole 10 times larger than itself.

• What is the ultramassive black hole IRAS 20100−4156 like?

  IRAS 20100−4156 is 3.8 billion suns in mass and as wide as a solar system. It has the mass of 3.8 billion suns but is only as dense as air.

• How dense are larger black holes?

  Larger black holes are less dense. A sun-mass black hole is only about 6 km wide and has a density of about one Himalayan range per cubic meter.

• How weird are black holes?

  Black holes are much weirder than commonly thought. They can create infinite universes. Contrary to the common explanation, larger black holes are less dense.

• 00:00 Black holes are weirder than you think and can create infinite universes, but they are not as dense as often explained.
• 01:51 The ultramassive black hole IRAS 20100−4156 has the mass of 3.8 billion suns but is only as dense as air. The observable universe's mass is enough to create a black hole 10 times larger than itself.
• 03:41 Inside a black hole, space and time behave differently, creating a universe where space is infinite and time is finite. Eventually, the entire universe inside the black hole collapses into a singularity.
• 05:33 The singularity inside a black hole crushes everything with infinite gravity and energy. A Big Crunch might lead to a Big Bounce, giving birth to a new universe inside a black hole. The universe could be part of a cycle of black holes creating new universes.
• 07:25 Cyclic universes could result in variations in physical laws and conditions, leading to the creation of different types of universes. Universes favoring the production of black holes may become more common, potentially leading to conditions favorable for life. However, these ideas are speculative and not testable.
• 09:25 Kurzgesagt introduces the Guide to Curiosity, an interactive adventure to awaken curiosity and support the channel.