For more info on how birth order and other aspects of the sibling relationships affect who we become as individuals, see the slew of scientifically based “who knew?” sibling trivia below. Which facts about siblings surprised you the most? *Images © iStock.com/ArtisticCaptures; © iStock.com/jaroon     * More from The Stir: 7 Surprising Scientific Facts About Fall Babies More from The Stir: 13 Surprising Scientific Facts About Boys More from The Stir: 9 Surprising Scientific Facts About Youngest Children More from The Stir: 11 Surprising Scientific Facts About Firstborn Children

13 Surprising Scientific Facts About Siblings - 4413 Surprising Scientific Facts About Siblings - 8813 Surprising Scientific Facts About Siblings - 3713 Surprising Scientific Facts About Siblings - 7013 Surprising Scientific Facts About Siblings - 2113 Surprising Scientific Facts About Siblings - 1113 Surprising Scientific Facts About Siblings - 8013 Surprising Scientific Facts About Siblings - 5713 Surprising Scientific Facts About Siblings - 5613 Surprising Scientific Facts About Siblings - 7413 Surprising Scientific Facts About Siblings - 5613 Surprising Scientific Facts About Siblings - 3713 Surprising Scientific Facts About Siblings - 4713 Surprising Scientific Facts About Siblings - 213 Surprising Scientific Facts About Siblings - 7713 Surprising Scientific Facts About Siblings - 54

title: “13 Surprising Scientific Facts About Siblings” ShowToc: true date: “2024-09-13” author: “Wilma Downing”

For more info on how birth order and other aspects of the sibling relationships affect who we become as individuals, see the slew of scientifically based “who knew?” sibling trivia below. Which facts about siblings surprised you the most? *Images © iStock.com/ArtisticCaptures; © iStock.com/jaroon     * More from The Stir: 7 Surprising Scientific Facts About Fall Babies More from The Stir: 13 Surprising Scientific Facts About Boys More from The Stir: 9 Surprising Scientific Facts About Youngest Children More from The Stir: 11 Surprising Scientific Facts About Firstborn Children

13 Surprising Scientific Facts About Siblings - 6813 Surprising Scientific Facts About Siblings - 2513 Surprising Scientific Facts About Siblings - 1213 Surprising Scientific Facts About Siblings - 6513 Surprising Scientific Facts About Siblings - 713 Surprising Scientific Facts About Siblings - 3913 Surprising Scientific Facts About Siblings - 5613 Surprising Scientific Facts About Siblings - 6713 Surprising Scientific Facts About Siblings - 1413 Surprising Scientific Facts About Siblings - 3513 Surprising Scientific Facts About Siblings - 2313 Surprising Scientific Facts About Siblings - 5713 Surprising Scientific Facts About Siblings - 4713 Surprising Scientific Facts About Siblings - 2513 Surprising Scientific Facts About Siblings - 4513 Surprising Scientific Facts About Siblings - 67

title: “13 Surprising Scientific Facts About Siblings” ShowToc: true date: “2024-10-23” author: “Sally Pimentel”

For more info on how birth order and other aspects of the sibling relationships affect who we become as individuals, see the slew of scientifically based “who knew?” sibling trivia below. Which facts about siblings surprised you the most? *Images © iStock.com/ArtisticCaptures; © iStock.com/jaroon     * More from The Stir: 7 Surprising Scientific Facts About Fall Babies More from The Stir: 13 Surprising Scientific Facts About Boys More from The Stir: 9 Surprising Scientific Facts About Youngest Children More from The Stir: 11 Surprising Scientific Facts About Firstborn Children

13 Surprising Scientific Facts About Siblings - 8513 Surprising Scientific Facts About Siblings - 6113 Surprising Scientific Facts About Siblings - 1013 Surprising Scientific Facts About Siblings - 3213 Surprising Scientific Facts About Siblings - 1913 Surprising Scientific Facts About Siblings - 7713 Surprising Scientific Facts About Siblings - 7613 Surprising Scientific Facts About Siblings - 1613 Surprising Scientific Facts About Siblings - 9413 Surprising Scientific Facts About Siblings - 713 Surprising Scientific Facts About Siblings - 4713 Surprising Scientific Facts About Siblings - 3413 Surprising Scientific Facts About Siblings - 5613 Surprising Scientific Facts About Siblings - 6613 Surprising Scientific Facts About Siblings - 8013 Surprising Scientific Facts About Siblings - 21

title: “13 Surprising Scientific Facts About Siblings” ShowToc: true date: “2024-09-06” author: “Pierre Castanada”

For more info on how birth order and other aspects of the sibling relationships affect who we become as individuals, see the slew of scientifically based “who knew?” sibling trivia below. Which facts about siblings surprised you the most? *Images © iStock.com/ArtisticCaptures; © iStock.com/jaroon     * More from The Stir: 7 Surprising Scientific Facts About Fall Babies More from The Stir: 13 Surprising Scientific Facts About Boys More from The Stir: 9 Surprising Scientific Facts About Youngest Children More from The Stir: 11 Surprising Scientific Facts About Firstborn Children

13 Surprising Scientific Facts About Siblings - 4113 Surprising Scientific Facts About Siblings - 6113 Surprising Scientific Facts About Siblings - 413 Surprising Scientific Facts About Siblings - 9713 Surprising Scientific Facts About Siblings - 1413 Surprising Scientific Facts About Siblings - 6613 Surprising Scientific Facts About Siblings - 8813 Surprising Scientific Facts About Siblings - 3813 Surprising Scientific Facts About Siblings - 2213 Surprising Scientific Facts About Siblings - 2813 Surprising Scientific Facts About Siblings - 213 Surprising Scientific Facts About Siblings - 7713 Surprising Scientific Facts About Siblings - 1713 Surprising Scientific Facts About Siblings - 8013 Surprising Scientific Facts About Siblings - 1113 Surprising Scientific Facts About Siblings - 50

title: “13 Surprising Scientific Facts About Siblings” ShowToc: true date: “2024-10-11” author: “Thomas Kinney”

For more info on how birth order and other aspects of the sibling relationships affect who we become as individuals, see the slew of scientifically based “who knew?” sibling trivia below. Which facts about siblings surprised you the most? *Images © iStock.com/ArtisticCaptures; © iStock.com/jaroon     * More from The Stir: 7 Surprising Scientific Facts About Fall Babies More from The Stir: 13 Surprising Scientific Facts About Boys More from The Stir: 9 Surprising Scientific Facts About Youngest Children More from The Stir: 11 Surprising Scientific Facts About Firstborn Children

13 Surprising Scientific Facts About Siblings - 9913 Surprising Scientific Facts About Siblings - 6513 Surprising Scientific Facts About Siblings - 6313 Surprising Scientific Facts About Siblings - 2513 Surprising Scientific Facts About Siblings - 1513 Surprising Scientific Facts About Siblings - 1513 Surprising Scientific Facts About Siblings - 8613 Surprising Scientific Facts About Siblings - 7613 Surprising Scientific Facts About Siblings - 6913 Surprising Scientific Facts About Siblings - 2313 Surprising Scientific Facts About Siblings - 9913 Surprising Scientific Facts About Siblings - 3213 Surprising Scientific Facts About Siblings - 9413 Surprising Scientific Facts About Siblings - 8213 Surprising Scientific Facts About Siblings - 8313 Surprising Scientific Facts About Siblings - 35