Answer:

• The Schwarzschild radius is a physical parameter that shows up in the Schwarzschild solution to Einstein's FIELD equations, corresponding to the radius defining the event horizon of a Schwarzschild black hole. It is a characteristic radius associated with every quantity of mass.
• Telepathy is the purported vicarious transmission of information from one person to another without using any known human sensory channels or physical interaction.
• Time travel is the concept of movement between certain points in time, analogous to movement between different points in space by an object or a person, typically with the use of a hypothetical device known as a time machine.
• A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of GENERAL relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.
• A wormhole is a speculative structure linking disparate points in spacetime, and is based on a special solution of the Einstein field equations. A wormhole can be visualized as a tunnel with two ends at separate points in spacetime.
• Octopuses are cephalopods, invertebrates that also INCLUDE SQUID and cuttlefish. They have bulbous heads, large eyes, and eight very useful arms.