text: yaar,kal mujhe ek documentary mili thi black holes ke baare mein, unki gravity toh itni strong hoti hai ki light bhi escape nahi kar sakti!bilkul, aur soch, agar hum kabhi black hole ke paas pohonche toh kya hoga, kya hum wahan se kabhi waapas aa payenge, yeh soch kar hi dar lagta hai!