For birds, siblinghood can be a matter of life or death
Some birds kill their siblings soon after hatching. Other birds spend their whole lives with their siblings and will even risk their lives to help each other.
Science of Siblings
Got brothers or sisters? Warm sibling bonds help boost happiness as you age
Researchers have found that a warm, close bond with a sibling in early adult life is predictive of good emotional health later in life, with less loneliness, anxiety and depression.
How do you get siblings to be nice to each other? Latino families have an answer
Over the past few decades, psychologists have begun to understand how parents across many cultures teach their children to build deep, fulfilling relationships with their siblings.
How two good friends became sworn siblings — with the revival of an ancient ritual
Thousands of years ago, there was a ceremony to bind close friends together as sworn siblings. Could the practice be resurrected today to strengthen modern friendships? Two women did just that.
COMIC: Our sun was born with thousands of other stars. Where did they all go?
Our sun was born in a cosmic cradle with thousands of other stars. Astrophysicists say they want to find these siblings in order to help answer the question: Are we alone out there?
Gay people often have older brothers. Why? And does it matter?
Studies worldwide show that queer people tend to have more older brothers than other kinds of siblings. Justin Torres, a queer novelist and the youngest of three brothers, asks: Should it matter?
Sisters make peace with dark memories through art, science and each other
Two sisters found they had different recollections of a traumatic childhood experience and learned that human memory is a lot less reliable than we tend to think.
A gunman stole his twin from him. This is what he's learned about grieving a sibling
About 60,000 children a year in the U.S. lose a sibling. Zion Kelly joined that unlucky group in 2017 when his twin, Zaire, was killed. Zion has learned a lot about grief, and himself, since then.
In the womb, a brother's hormones can shape a sister's future
When siblings share a womb, sex hormones from a male fetus can cause lasting changes in a female littermate. This effect exists for all kinds of mammals — perhaps humans too.
Blended families are common. Here are tips to help stepsiblings get along
Researchers have learned a lot about blended families since the 1970s — when The Brady Bunch painted a perfect picture of stepsiblings getting along. Some of their advice might surprise you.