The tridacna clam can grow up to four feet long and weigh up to 500 pounds.

Popped popcorn should be stored in the freezer or refrigerator as this way it can stay crunchy for up to three weeks.

There was a post office on the Russian space station Mir. Visiting cosmonauts would use unique postal "markers" to stamp envelopes and other items as having flown aboard the Mir space station.

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