Evolution pushes on as European men grow taller

Evolution pushes on as European men grow taller
A better diet and fewer illnesses mean the average height of a European man is now 177.37cm (5ft 10in).

A new study shows that the average height of European men has increased by nearly 11cm since the 1870s. Museum human origins expert Prof Chris Stringer explains why height fluctuates over time.

New research has shown that the average height of men across 15 European countries increased by nearly 11cm between the 1870s and 1980.

In Britain, the average height of a 21-year-old man increased from 1.67m (5ft 5in) in the 1870s to 1.77m (5ft 10in) in 1971-75.

Researchers from the economics departments at the University of Essex and the Australian National University in Canberra said this represents a dramatic improvement in the health of the general population.

People have generally been growing taller across Europe, the Far East and Japan since Roman times, predominantly due to better nutrition.

Better diet and less illness

This most recent , however, spans a period of time that covered both World Wars and the Great Depression, suggesting the biggest cause was 'an improving disease environment', reflected in falling .

This would have been the result of ongoing improvements in sanitation, hygiene and nutrition, as well as smaller family size, which means fewer mouths to feed.

Commenting on the new research, Prof Chris Stringer, expert at the Natural History Museum, said that height has always fluctuated over time.

Evolution pushes on as European men grow taller
The long Boxgrove tibia suggests that Boxgrove Man, living half-a-million years ago, was nearly 1.83m (6 ft) tall, and very strongly built.

Early modern humans in Africa were tall, whereas Neanderthals who lived in Europe were relatively short.

'There is always a variation in height within a species," Prof Stringer said, 'but determines what height each of us ideally should be .

'The genes controlling height are also subject to natural selection, so can change through time as a species continues to adapt to it environment.'

Living in a hot, dry environment, it's advantageous to be tall and slim in order to lose heat. In , it's better to be short and stocky to better retain heat.

Genetically, northern Europeans have tended to be tall in the past few thousand years, but height is always subject to environmental limitations.

Disease or lack of nutrition can interfere with genetic programming and mean we won't achieve our target height.

People living in the middle ages, for example, who were genetically similar to us and predisposed to be tall, were in fact short because of childhood disease and a limited diet.

'This doesn't mean that if we carry on eating, we will keep growing taller', said Prof Stringer.

'There is a limit, based on our genes, to how big the tallest will be and how small the smallest will be, based not only on our parents' genes but genes going back through time.'

Early humans to visit Museum

Realistic life-sized models illustrating the different builds of ancient humans will be on display in the Museum in an upcoming exhibition, Britain: One Million Years of the Human Story.

Among the models will be a tall early modern human from 30,000 years ago, built for endurance running, and a short, stockier Neanderthal.

The real fossil tibia (shin bone) of Boxgrove Man from 500,000 years ago will also be on show.

The exhibition opens in February 2014.

More information: Oxford Economic Papers: How have Europeans grown so tall?

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Sep 07, 2013
Title is biased and misleading, given the article says no such thing, and focuses on the fact that the primary changes are not genetic, but rather nutritional and pathogenic.
Sep 07, 2013
Nutrients metabolize to pheromones associated with morphogenesis that includes differences in finches beaks, and men being taller than women. Sexual selection is for pheromones that classically condition hormone responses and behavior via precisely the same molecular mechanisms involved in vertebrate and invertebrate nutrient selection (and species diversity sans mutations). Speciation is, of course, not due to diet alone. The metabolism of nutrients to pheromones that control reproduction also controls individual differences (e.g., in height) and speciation.

See: Nutrient-dependent/pheromone-controlled adaptive evolution: a model http://www.socioa...ew/20553
Oct 17, 2013
quote-- Title is biased and misleading, given the article says no such thing, and focuses on the fact that the primary changes are not genetic, but rather nutritional and pathogenic. --unquote

The article does not need to mention genetic changes, everyone knows that evolution has changed us over the course of our existence and continues to do so today.

The fact that we are healthier due to advances we have made has allowed evolution to focus on other aspects of our being, height being one of those aspects.

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