Tech UPTechnologyWhy are pygmies so short?

Why are pygmies so short?

About 920,000 pygmies live, threatened by deforestation and forced displacement, in scattered communities – aka, efé, mbuti, batwa, baka – throughout nine countries in central Africa. They are characterized by their short stature – men measure around 1.5 meters, and women, 1.45 -, their short life expectancy – between 17 and 24 years – and their genetic divergence. These archaic populations, dedicated to hunting and gathering, would have separated from the common African trunk about 70,000 years ago and adapted to extreme living conditions.

One theory attributed their small size to a poor diet , but Turkanas and Msai reach considerable heights and are also exposed to a poor diet. A few years ago, a study from the University of Pennsylvania pointed out that the height of pygmies would have a genetic basis linked to their early reproductive maturity and their resistance to infectious diseases. The genetic pressure to leave offspring would have affected their size.

Another later work, also from this University, defended that natural selection would have made the pygmy phenotype evolve to give its bearer advantages in a jungle, hot and humid environment, and make his organism save energy. The short stature allows less stooping in the dense forest and gives greater freedom of movement.

What are the real impacts of a golf course?

Although it may seem that golf is a sport closely linked to natural spaces, it actually has a great impact on the environment.

The South American firefly, a new invasive species in Spain?

Initially it was identified as a new species of firefly, although it was soon seen that, in fact, it had been brought by the human hand from Argentina.

NASA discovers more than 50 areas that emit exorbitant levels of greenhouse gases

NASA's 'EMIT' spectrometer locates has targeted Central Asia, the Middle East and the US among others.

Scientists identify the exact number of hamburgers you can eat without destroying the Earth

A new report highlights how much we should reduce our meat consumption per week to prevent the climate crisis from worsening.

Can an alligator have feathers?

If alligators and crocodiles have the genes that allow them to form feathers, why aren't they feathered?