Human physiology

New findings suggest fingerprints and sweat work together in "fight or flight" survival responses.

Traditional microscopes make it look like sperm tails undulate symmetrically -- but that's an optical illusion.

Study attributes age-related hearing loss to hair cells -- the same sense organs that are damaged by loud noises.

What links a wildfire raging across a forest to the electric signals rippling through our hearts? Enter the world of waves in excitable media.

Study identifies having a fat tongue as a primary factor in the common sleep disorder.

Researchers found that when we fall from different heights, our bodies move differently to absorb the impact.

Oxygen-sensing genes allow cells to adapt when oxygen levels drop.

New study of hearts from apes and humans shows that people need to be active to have healthy hearts.

New study shows that we direct our gazes differently even when we are staring at the same images.

Different people respond to cannabis in different ways, making a blood THC level difficult to legislate.

Eating softer processed foods changed the position of humans' adult teeth, making it easier to say sounds like "f" and "v," new research suggests.

Polio peaks in the summer, measles during the school year, and chickenpox in the spring.