The brains of our ancestors grew larger and smarter thanks to an increase in the flow of blood to the brain
Taking the placenta as a case study, researchers are able to piece together how new organs evolve, by repurposing old tissues and using them to do new jobs.
A new fossil study challenges 130 years of thinking about how dinosaurs evolved.
Many are embarrassed to publicly show too much grief over the death of a dog. But research has shown just how devastating the loss can be.
In science, the word 'theory' has a very specific meaning that's easy for nonscientists to misunderstand or misconstrue. Here's what a theory must withstand to be accepted by the scientific community.
The first truly terrestrial animals evolved from ancient fishes that left the water for land. But what prompted to move has been a mystery.
There are plenty of mammals that have adapted to life in water, some more than others. That meant they also had to adapt the way they feed.
Their days were numbered for quite some time ...
Newly recognised genetic populations carry their evolutionary history with them, and the history of their habits. This is why detecting new species is so important.
How do we determine what is fact? An archaeologist explains how the answer has changed over time and why it matters so much now.
Like humans, some animals have evolved a highly developed sense of fairness.
Do organisms adapt after they arrive in new environments or are the adaptations what lets them to move to new locations?
It's difficult to sort out the conservation 'wheat' from the 'chaff' when too many subspecies are defined.
Much like the hair you carefully rearrange before a selfie, your cheek muscles and the accompanying smile date back about 250 million years.
We have the penis of a monogamous primate yet our body sizes suggest our ancestors slept around a lot.
Victorian attitudes influenced what scientists thought they were observing about sexual behaviors in the animal world. But modern techniques reveal the myth for what it is.
The first teeth may have evolved from combination of scales and tastebuds.
New research shows viruses can effectively turn bacteria into animal-like cells.
The way early humans learned to handle food could explain why the majority of people today are right handed.
A cryptic part of DNA helps keep a species' mutations in check until they become useful.