Here's why:
* Giant meteors are rare: While small meteors enter the Earth's atmosphere regularly, large ones are extremely infrequent.
* Impact events are well-documented: Any impact event significant enough to be called "giant" would have left a massive crater and significant geological evidence. Scientists closely monitor and document such events.
* Confusion with other events: You may be thinking of a different event, like a large meteorite found or a significant impact in the distant past.
If you can provide more information about the event you're interested in, I may be able to help!
