Most animal groups adopted their shapes quickly but some kept evolving.
Some of the ‘remarkable beetles’ Wallace collected in Borneo.
A. R. Wallace
An evolutionary biologist visits the remote jungle mountaintop where a little-known naturalist wrote his insightful paper about the mechanisms of evolution that spurred on a rivalrous Charles Darwin.
Birds don’t fly across wide Amazonian rivers like the Rio Negro.
Marcos Amend www.marcosamend.com (for use with this article only)
Rivers are natural boundaries for evolving populations. But scientists don't agree whether they create new species or just help maintain them. Research using birds' molecular clocks provides some answers.
Forest near Sarayaku, Ecuador.
What drives the emergence and disappearance of species? By modeling the fundamental processes of evolution and ecology on geographical scales, new research spotlights topography and climatic shifts.
Neymar in pain. Or is he faking it?
Vocal deception may have played a key role in our progression from primitive nonverbal noises to complex, controlled speech.
WWE wrestler Triple H at a live event in Orlando 2008.
WWE SmackDown Triple/wikipedia
New research on roaring shows that women underestimate their own strength.
New research shows green-blooded skinks have evolved multiple times, which could help lead to explanation as to why.
Negative results are still useful, and should not be hidden.
Questionable research practices are not fraud, and they're not cause for panic. But they do give us some hints about how we can make science more robust.
Watching bacteria and viruses duke it out, evolving to outwit each other.
UC San Diego
A core idea in molecular biology is that one gene codes for one protein. Now biologists have found an example of a gene that yields two forms of a protein – enabling it to evolve new functionality.
More and more evidence shows evolution isn't as random as often thought.
Your voice can affect how attractive, fertile and faithful people think you are.
New research suggests life on Earth became more diverse because of a change in biology related to stem cells, not just rising oxygen levels.
Super-black feathers on these guys are like looking into a dark cave.
Male Birds of Paradise have patches of super-black plumage that absorb 99.95 percent of light. New research identified their feathers' microscopic structures that make them look so very dark.
Is this how we got the sperm and the egg?
An ancient sexual conflict over mitochondrial inheritance may be responsible for the evolution of the two sexes as we know them.
World map of linguistic families / Wikimedia Commons
Evolutionary biologists ask very similar questions about species to those asked by linguists about languages.
Ancient whales, such as
Janjucetus illustrated here, used their sharp teeth to capture and process their prey.
Ancient whales were neither gentle, nor giants: they were smaller than those of today and judging from their teeth, a lot meaner.
Could millennia of gendered environments prevent the development of genetic mechanisms for gender differences?
A stable environment that teaches men to be men and women to be women could be helping to enforce gender across generations.
Hervé Sauquet & Jürg Schönenberger
Scientists have reconstructed the common ancestor of everything from rose bushes to oak trees, ivy or wheat.
A group of lizards in Brazil have evolved bigger heads in just 15 years thanks to their new environment.
Developing lizard embryo beneath placental tissues.
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.