A new study examining how much energy males and females spend carrying babies in different positions reported that women expend less energy carrying their babies than men in all carrying positions. Carrying a baby on one’s back was the most energy efficient and people carrying babies this way were able to maintain their unloaded walking speeds. The study was published in Evolutionary Human Sciences.

Our lifespans might feel like a long time by human standards, but to the Earth it's the blink of an eye. Even the entirety of human history represents a tiny slither of the vast chronology for our planet. We often think about geological time when looking back into the past, but today we look ahead. What might happen on our planet in the next billion years?

But they have some very compelling theories

Charles Darwin believed evolution created "endless forms most beautiful".

Two scientists explain how analyses of oxygen isotopes from ancient ape teeth could lead to new insights on early human evolution.

A scaly, finned creature that lived in water 385 million years ago descended from four-legged land animals, in a clear example of a “backward” step in evolution.

Paleo Analysis

Strange as it sounds, scientists still do not know the answers to some of the most basic questions about how life on Earth evolved. Take eyes, for instance. Where do they come from, exactly? The usual explanation of how we got these stupendously complex organs rests upon the theory of natural selection.

Garter snakes can consume amazingly toxic prey. This article is a fascinating insight into this harmless,charming little snakes diet.

In the United States, however, the situation is completely different. The fate of incumbents, candidates and even nominees to public positions can be derailed if they provide the wrong answers on questions of faith.

Mounting evidence suggests humans are now a major driving force of evolution on Earth. From selective breeding to environmental modifications, we're altering so much of our world that we're not only now driving the climate, but the direction of life

To the naturalist in me, the world is full of sorrows: extinctions, the deaths of ancient forests, fires and floods. But the evolutionary biologist in me is more sanguine. The process of evolution continues unabated. If anything, humans have caused it to speed up.

Crabs have evolved at least five separate times, and the process for adopting a crab shape is so popular it even has a name—carcinization.

One of the best-known but also most contentious ideas in psychology has to be that there are “universal” expressions of at least some human emotions. According to this idea, which was pioneered by Paul Ekman, particular patterns of facial muscular movements are reliable indicators of anger, disgust, fear, surprise, happiness, sadness and contempt, no matter where you are in the world. In other words, these expressions are a fundamental part of being human.

An international team of scientists from New York University, the University of the Witwatersrand and 15 other institutions announced today in the open-access journal eLife the discovery of ...

Species was direct ancestor of early humans in Africa and discovery has led to reassessment of epoch