| 41. | The improvements included the addition of electrical heaters that warm the O-ring seals to at least 75 degrees, regardless of external temperatures.
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| 42. | Design engineers added a third O-ring seal to the joints between the segments after the 1986 Space Shuttle " Challenger " disaster.
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| 43. | Notwithstanding the occasional pork chop, polar bears typically eat only when they're out on the ice and able to hunt ring seals.
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| 44. | Disintegration of the entire vehicle began after an O-ring seal in its right solid rocket booster ( SRB ) failed at liftoff.
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| 45. | O-ring seals in Challenger's right solid-fuel rocket booster deteriorated during the overnight freeze, and hot gases leaked from the joint at liftoff.
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| 46. | An unaddressed design problem with an O-ring seal on another part of the shuttle booster was blamed for the fatal 1986 Challenger accident.
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| 47. | The tragedy was triggered when high-pressure exhaust gases rushed past the O-ring seal with a force that ripped the rising space shuttle apart.
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| 48. | Thiokol's previous incarnation was Morton Thiokol, which was blamed for the O-ring seals that failed and led to the Challenger explosion in 1986.
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| 49. | Meeka Mike reaches into a hole in the ice of Frobisher Bay and tugs on the net, pulling out a fat ring seal.
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| 50. | With a rubber ring seal and a smaller bullet, the Chassepot had a maximum effective range of some with a short reloading time.
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