the nests? they're made up of mostly mud
If you are referring to sink holes, they form when groundwater makes the ground unstable and it collapses.
The area of Water End Swallow Holes is 113,000.0 square meters.
Swallow holes are also known as sink holes or sluggas. They are openings in the beds of rivers which occur when the surface river flows over an opening and then disappears underground through this swallow hole.
They swallow up your house
No, a supermassive black hole is what makes a quasar.
the more massive will swallow the smaller
if two black holes collide, they swallow eachother making one giant blackhole
people eat the limestone and live in the underground cavern's :) ... actual lol
Swallow tires are made by the German company called "Schwalbe", which means swallow in German.
Swallow holes are openings in the ground where surface water flows into underground caves or cavities. They are common in karst landscapes, where limestone or other soluble rock can be dissolved by water, creating underground passages. Swallow holes can sometimes result in sinkholes forming on the surface.
anything it can reach that cant travel even faster than the speed of light. Absolutly everything.
You swallow them whole. The capsule is made of gelatin and will dissolve in your stomach.