Unless you die young, you’re likely to grow old. And although this is not without challenges, there are numerous upsides including financial security, learning to say “no” to people, experiences or activities you simply don’t enjoy, and the resultant contentment that comes from being true to yourself.
I found the following facts interesting, and hope you do too.
Old Age Isn’t (Just) a Modern Phenomenon
A common misconception is that our predecessors lived brutish lives cut short by disease and war. While modern medicine has certainly expanded life expectancy, many people in the past lived as long as people live today. For example, some ancient Roman offices sought by politically ambitious men couldn’t even be held until someone was 30.
When scientists analyzed the pelvis joints (a reliable indicator of age) in skeletons from ancient civilizations, they found that many people lived long lives. One study of skeletons from Cholula, Mexico, between 900 and 1531 CE found that a majority of specimens lived beyond the age of 50. Low life expectancy in ancient times was more the result of high infant mortality rates than of people living unusually short lives. Modern science has helped more humans survive our vulnerable childhood years and life expectancy averages have risen as a result.
It’s a Myth that Older People Require Less Sleep
The amount of sleep each of us needs is only altered during childhood and adolescence as our bodies require more energy to do the tough work of growing. Once we’re in our 20s, humans require the same amount of sleep per night for the rest of our lives (though the exact number of hours differs from person to person). In fact, the elderly are more likely to be sleep-deprived because they receive lower-quality sleep caused by sickness, pain, medications, or a trip or two to the bathroom. This can be why napping during the day becomes more common as we grow older.
Some of Our Bones Never Stop Growing
While we’re likely to get shorter as we age, some bones keep growing. A 2008 study for Duke University revealed that skull bones continue to grow, with the forehead moving forward and cheek bones moving backward. Unfortunately, this imperceptible bit of facial movement exacerbates wrinkles, because as the skull shifts forward, the overlying skin sags.
The pelvis also keeps growing throughout our lives. Scientists analyzing the pelvic width of 20-year-olds compared to 79-year-olds found a 1-inch difference in width, which adds an additional 3 inches to your waistband. That means our widening in the middle as we age isn’t our imagination — or about a slower metabolism.
Pupils Get Smaller As We Age
While our hips get bigger, our pupils get smaller. The human pupil is controlled by the circumferential sphincter and iris dilator muscles, which weaken as we get older. Because of this loss of muscle function, pupils get smaller as we age, and are also less responsive to light. Smaller pupils make it harder to see at night (hello, reading a menu in a dark restaurant?!), so people in their 60s need three times as much light to read comfortably as people in their 20s.
Other eye changes include an increased likeliness of presbyopia, or farsightedness (often be resolved with readers), and cataracts, a clouding of the eye’s lens. In fact, half of people over the age of 80 will have experienced a cataract of some kind.
Older People Have a Stronger “Immune Memory”
Although the body experiences some slowing down as we age, growing old isn’t all bad news. Researchers from the University of Queensland found that older people had stronger immunities than people in their 20s, as the body keeps a repository of illnesses that can stretch back decades. This extra line of defense begins to drop off in our 70s and 80s, but until then, our bodies generally just get better and better at fighting off disease due to biological experience. Additionally, as we age we experience fewer migraines, the severity of allergies declines, and we produce less sweat. Older people also exhibit higher levels of “crystalized intelligence” (or what some might call “wisdom”) than any other age group.
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The Atoms That Make Up All of Us Are Already Billions of Years Old
If age is just a number, in the cosmic view human age is rather insignificant. The atoms that make up the human body are already billions of years old. For example, hydrogen — one of the key components of our bodies — formed in the Big Bang 13.7 billion years ago. Likewise, carbon, the primary component of all known life, formed in the fiery cauldron of stars at least 7 billion years ago.
Which, comparatively speaking, makes us all universally young. I find that strangely comforting!
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