Jennifer Welsh

Our brains weigh the risk and reward others struggle with when making a decision.

Increasing dopamine levels could be what wakes you up in the morning.

'Thank You' goes a long way to keeping couples happy

It may take more than 130 years for the population to return to its pre-Ebola size.

Genetic test could save puppies (and humans) from short lives.

Dogs that become aggressive may be suffering from undiagnosed pain.

A drop of rain turns a pitcher plant lid from a safe zone into a death zone.

Unequal employment and pay add to mom's stressors, because they make her feel the need to do more housework.

The bonobos genome will help unravel the secrets that separate humans, physically intellectually and behaviorally, from our closest primate relatives.

Snakes' scales and body muscles help them climb narrow crevices on tree bark.

See how snakes use their scales and body muscles to climb trees.

After ditching their genitals, male spiders get an extra dose of endurance due to their decreased body weight.

The Museum of the Confederacy released several photos of unidentified soldiers and their families — do any look familiar?

The Museum of the Confederacy released several photos of unidentified soldiers and their families — do any look familiar?

It's not just your surly morning demeanor, morning people are happier in general than night owls.

Bat's flying deficiency could be why birds are more migratory.

The beak-like weapon used to ram enemy ships is suffering the strain of sulfuric acid.

Mite's bite injects bees with colony-collapsing virus.

Beware what headgear you ware around vampire spiders: If your antennae aren't elaborate enough, the spider might eat you up.

During pregnancy women's organs contain placental cells, along with immune and connective tissue cells from the fetus.

Researchers may have oversold the weight of some ancient creatures, a new analysis suggests.

Competition from birds and bats beat ancient bugs down to size.

When it comes to social behaviors, like mating and aggressive acts, the underlying decision making process in the brain is the same in birds, reptiles, mammals and fish.

Electrical and chemical stimulation, along with active training, can heal spinal cord injuries in rats, and potentially humans.

A gene mutation in fruit flies creates symptoms of restless leg syndrome.