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TIL that when parents show favoritism or interfere in sibling conflict, those siblings are more likely to tend to conflict later in life, and less likely to collaborate in the care of the older parents.

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kOODm TIL that the entire US-Canada border is defined by a 20 ft. deforested area called "The Slash".
4XAdg TIL unlike most other science fictions shows, the space scenes in the show ‘Firefly’ were done silently, because sound cannot be transmitted in the vacuum of space.
KYJrJ TIL that Roman concrete has lasted for millennia due to its unique ingredients. Unlike modern concrete, which can weaken over time, Roman concrete was made with volcanic ash, lime, and seawater. This mix actually helped it strengthen over the centuries and resist cracking.
KYnw TIL Catholic priests were ordered to be celibate so that the church’s riches would not be “shared or inherited” away to the priests’ families.
69Egm TIL All of the gold discovered thus far would fit in a cube that is 28 meters (98 feet) wide on every side.