Examine your fingers. Which is longer? Is it the index finger (the finger you use to point with – technically the second digit, or 2D, counting the thumb), or the ring finger (the fourth digit, or 4D) ...

The evolution of the human species is marked by an increase in brain size. Now new research suggests that could be partly dependent on increases in prenatal estrogen—revealed by looking at the length ...

New research published in the American Journal of Human Biology has shown a link between certain digit ratios, in this case the ratio between the length of the index finger and ring finger, and oxygen ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Shutterstock Some ...

A new analysis finds that people with longer ring fingers than index fingers may have an edge in endurance performance—but experts urge caution. Fact checked by Nick Blackmer Look at your hand right ...

The efficiency of oxygen supply to tissues is a factor in the severity of important diseases such as Covid-19 and heart conditions. Scientists already know that the relationship between the length of ...