{"id":14212,"date":"2022-06-27T05:00:55","date_gmt":"2022-06-27T03:00:55","guid":{"rendered":"https:\/\/www.sciencefocus.com\/?p=122439"},"modified":"2022-06-27T05:40:10","modified_gmt":"2022-06-27T03:40:10","slug":"9-ways-your-childhood-was-weird","status":"publish","type":"rss_feed","link":"https:\/\/c01.purpledshub.com\/bbcsciencefocus\/rss_feed\/9-ways-your-childhood-was-weird\/","title":{"rendered":"9 ways your childhood was weird"},"content":{"rendered":"

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By Dr Brenna Hassett\n \t\t<\/p>

Published: Monday, 27 June 2022 at 12:00 am<\/p>

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Humans have a uniquely long childhood, which sets us apart from all other species on the planet. We invest so heavily in our offspring that we have taken a different evolutionary path from even our closest primate relatives.<\/span><\/p>\n

In her new book, Growing Up Human<\/em>, anthropologist and archaeologist Dr Brenna Hassett explores every aspect of human development from conception to adulthood. Using her expertise, she studies the teeth and bones of our ancestors in the fossil record, in order to piece together the evolution of our strange and wonderful childhood.<\/p>\n

Read on to find out why human childhood is weird.<\/p>\n

It took two people to make you<\/h2>\n

We have a habit of pair bonding to produce kids, compared with other primates that have rather different family dynamics. For example, there are 700+ members of a mandrill \u2018horde\u2019, marmoset females have more than one male partner, and gorillas live in groups of females with a single male.<\/p>\n

Only 15 per cent of our fellow primates opt for pair bonding like we do, and it is not seen in any of our closest relatives, the great apes.<\/p>\n

Your existence is incredibly unlikely<\/h2>\n

Being conceived in the first place is pretty tough if you\u2019re a human. Most primates have a much easier time getting pregnant than humans do \u2013 almost 90 per cent success rates compared to our 30 per cent.<\/p>\n

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Primates have fur, which allows their babies to cling on tightly \u00a9 Getty Images<\/span><\/figcaption><\/div>\n

Your mum was not furry<\/h2>\n

Your mother had no fur for you to cling to. Most other primate babies are born clingers, except for the few that carry their tiny babies in their mouths, or hide them in trees.<\/p>\n

Primate mums are lovely and furry, and primate babies have grasping hands that help facilitate this arrangement. Our own lack of fur might go some way to explaining the next utterly unlikely part of your childhood\u2026<\/p>\n

You have a dad<\/h2>\n

The other parent. The one who carries stuff (no matter what gender!). Like other great apes, humans need help to raise their babies, but we tend to involve our pair-bonded mates more than other animals \u2013 only about 5 per cent of other mammal species get the dad involved in child rearing.<\/p>\n

How much we get dads involved depends pretty heavily on our culture. There are dads of the Ba\u2019Aka people, who live in Cameroon, Gabon and Central Africa, that carry their babies for 22 per cent of the day. American dads don\u2019t quite average 50 minutes<\/em>.<\/p>\n

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Humans continue to live for many years after they can no longer reproduce, which means granny can offer valuable help and experience in rearing grandchildren \u00a9 Getty Images<\/span><\/figcaption><\/div>\n

You may have had a grandma<\/h2>\n

Human females stop being able to reproduce sometime around their fifth decade\u2026 but they keep on living. In contrast, elephants and chimpanzees, who live for almost as long as humans, will still be going through reproductive cycles throughout their whole lives.<\/p>\n

The only other animals that have these utterly unlikely women around are whales \u2013 and as with humans, whale grandmas seem to be able to help their children and grandchildren thrive.<\/p>\n

You ate like a zebra<\/h2>\n

The more watery an animal\u2019s milk, the more likely it is to be doled out frequently to a baby who is running alongside the mother, like a zebra, or being carried, like a human.<\/p>\n

If milk contains more concentrated nutrients like fat, then it is more likely that feeding happens only every so often, or for a limited time. For example, the milk of hooded seals is 60 per cent fat, and the mother will feed her baby for just four days.<\/p>\n

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Even though orangutans grow up comparatively faster than humans, they\u2019ll nurse for longer \u00a9\u00a0Getty Images<\/span><\/figcaption><\/div>\n

You didn\u2019t breastfeed for long<\/h2>\n

Our closest relatives, the great apes, nurse their babies for far longer than we do. Mother orangutans will nurse for up to eight years, compared to the two-to-four-year average of humans globally.<\/p>\n

But orangutans do not have a history of outsourcing milk like we do \u2013 we have thousands of years of archaeological evidence for baby bottles with animal milk residues, and 4,000-year-old cuneiform tablets with wet-nursing contracts from ancient Mesopotamia.<\/p>\n

You were a child for a long time<\/h2>\n

We may stop nursing comparatively younger, but we take a long time to reach physical maturity. Even chimpanzees, our closest relatives, are grown up at 10 or 12. We don\u2019t become fully developed and start having children of our own until much later.<\/p>\n

Even deep in the past, it is thought that humans did not have children until they were around 20.<\/p>\n

You are a serious investment<\/h2>\n

The rules of your society will determine how much investment to make in each child \u2013 and our species has chosen to bet heavily, for much longer than any other species.<\/p>\n

For thousands of years children have been given the chance to learn for longer, whether it\u2019s the boy lamenting his terrible schooldays in ancient Mesopotamia, or Aristophanes recalling the horrors of strict schoolmasters, or a Minoan girl learning to becoming a temple acolyte. But we still make decisions every day that allow some children the luxury of ever-longer dependence\u2026 and deny it to others. So the final shape of our childhood is, in the end, up to us.<\/p>\n

Growing Up Human: The Evolution Of Childhood<\/em><\/a> by Dr Brenna Hassett (\u00a317.99, Bloomsbury) is out 7 July 2022.\u00a0<\/p>\n

Read more about human evolution:<\/strong><\/p>\n