How the Cosmic Tree Gives Birth to Two Kinds of Black Holes ✛ ✎ ✦

Immediately after the Big Bang, space grew like a branching tree. Alan Guth proposed the idea of inflation — a super-fast expansion that made the cosmic microwave background so smooth. In this inflating world, each microscopic branch doubled and split, while random quantum fluctuations made some branches slightly denser. Branches heavy enough collapsed into primordial black holes.

These holes turned out to be of two types. The first is ordinary: a branch shrinks into a superdense point. The second is exotic: due to strong spacetime curvature, something like a knot forms. Outside, it's a black hole, but inside — endless inflation with the birth of new branches. Although Hawking and Penrose predicted the inevitability of holes, the second type turned out to be far stranger. In the eternal inflation regime, it dominates.

These holes are ideal candidates for dark matter, the invisible mass that holds galaxies together. Their collisions produce gravitational waves with a distinctive pattern. Computer simulations analyzing billions of branching structures confirmed: the exotic type will change the hunt for signals from the early universe.