11. But this burster , designated GRB971214, gave astronomers some of the clues they had long sought. 12. Paschall said a so-called burster releases the tear gas in a military tear gas canister. 13. And when the dam-burster came, it wasn't, shall we say, artistic. 14. Except for the Dec . 14 burster , none of their distances from Earth have ever been determined. 15. The burster , Filippenko said, may have radiated its energy outward in every direction, like a lightbulb. 16. Another nasty possibility came to light during the past year _ roasting by a nearby gamma-ray burster . 17. Their larvae, like those of predaceous diving beetles, do not possess eggshell-bursters on the head. 18. Many astrophysicists believe that bursters are very distant events in which the collision of neutron stars releases almost inconceivable energy. 19. Pulse Bursters release an explosive charge of pulse energy from all eight barrels of the burster at the same time. 20. Pulse Bursters release an explosive charge of pulse energy from all eight barrels of the burster at the same time.