Can You Solve The Newborn Baby Probability Puzzle?

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Can You Solve The Newborn Baby Probability Puzzle?

Time to dust off those probability math skills you sharpened in high school: this is a hard one. It's the probability puzzle presented by Presh Talwalkar of the MindYourDecisions YouTube channel that he says has been asked as an interview question. Here's the problem: On the morning of January 1, a hospital nursery has 3 boys and some amount of baby girls. That night, a child is born and is placed in the same nursery along with the other babies. On January 2, a child is selected at random from the nursery. The child is a boy. What is the probability the child born on January 1 was a boy? Get the answer by watching the video below, or by scrolling down to read the answer. Good luck!

The Embrace Infant Warmer Saves Babies' Lives

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The Embrace Infant Warmer Saves Babies' Lives

Every year, three million premature babies die in their first month of life because they lack the body fat they need to keep warm. In industrialized nations, these infants are routinely placed in incubators, but in impoverished countries, the $20,000 price tag for one of these machines is often unaffordable. The members of the company Embrace first met in a Stanford design class that challenged them to create a medical device that costs a fraction of that. After a few research trips to Nepal and India, they came up with a working prototype.

Babies Love Peekaboo Because They Lack Object Permanence

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Babies Love Peekaboo Because They Lack Object Permanence

Why do babies love peekaboo so much? It may be because when you hide your face, they think it has ceased to exist. That's according to Swiss psychologist Jean Piaget's theories about "object permanence," or the ability to know an object still exists even when it's hidden. Watching his 13-month-old nephew at play was when Piaget first noticed something unusual about the brains of babies. When the boy's ball rolled under a table where it was still visible, he would retrieve it and keep playing. But when it rolled under the couch where it wasn't visible, the boy looked for the ball where he had seen it last. This led Piaget to investigate exactly when babies develop object permanence.

Amazing Facts about Babies

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Amazing Facts about Babies

Babies are human just like the rest of us, but if you look at some of the ways they develop and behave, it may seem like they're a completely different species. In the second trimester, for instance, fetuses grow mustaches. This fine hair, known as lanugo, eventually spreads to cover the entire body. Shortly before birth, each hair is shed one by one and eaten, then excreted in the baby's first bowel movement. Taste is different than in an adult human, too. A newborn has tastebuds not only on the tongue, but also on the cheeks, tonsils, and the back of the throat. Babies have massive eyes, as well: while their heads are a small fraction of their adult size, their eyes are already 75% of the size they'll be in adulthood. To assist with birth, babies' bones aren't finished forming when they enter the world. Connections between joints fully develop later, so they have about 100 more bones at birth than they will in adulthood. We've collected some awesome videos on this topic. Watch them now to learn more.

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from geobeats

Key Facts to Know

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    Newborn babies have 300 bones, compared to an adult's 200. 0:48

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    Babies can't taste salt for the first four months of life. 1:11

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    Babies often go 5–10 seconds without taking a breath in a phenomenon known as periodic breathing. 1:42

The Penanggalan Is Scarier Than Any Vampire You've Seen In The Movies

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The Penanggalan Is Scarier Than Any Vampire You've Seen In The Movies

Penanggalans are terrifying figures from Southeast Asian legends. During the day they may appear as normal, beautiful women, but at night their heads detach from their bodies, carrying a dangling tail of viscera. This severed head flies in search of victims as the entrails below glitter like firefly lights. Children and pregnant women are the Penanggalans' preferred prey, and the Penanggalans themselves are typically midwives who made a pact with the devil.