29 March 2011, 02:15 PM ET
The deadliest poison dart frogs are also in the best shape.
29 March 2011, 09:46 AM ET
Scientists put the kibosh on "evidence" that humans lived alongside dinosaurs.
22 March 2011, 08:02 PM ET
Our oldest eukaryotic ancestors used sex to enhance their diversity.
15 March 2011, 08:03 PM ET
Burly female hyenas may get a reproductive leg up thanks to their size.
15 March 2011, 09:45 AM ET
They infect humans, fish, birds and are implicated in the disappearance of honey bees.
14 March 2011, 03:02 PM ET
Humans appear to have moved north without a way to cook and keep warm.
07 March 2011, 04:07 PM ET
Professor Lawrence Gilbert and his team at the University of Texas at Austin have discovered a population of tropical butterflies that exemplify "evolution in action," and a rare research opportunity.
03 March 2011, 02:01 PM ET
The wear on fossil horses' teeth reveals how their diet changed.
02 March 2011, 01:01 PM ET
Both groups evolved from a middle-of-the-road ancestor.
01 March 2011, 05:29 PM ET
Ancient mites preserved in amber provide a glimpse of 40 million-year-old sexual behavior.
28 February 2011, 05:16 PM ET
From an evolutionary perspective, Mormon polygamy was bad for women.
23 February 2011, 09:10 PM ET
Fossils thought to be from our earliest hominin ancestors might just be ape bones.
23 February 2011, 01:01 PM ET
A creature called a walking cactus may reveal the evolution of bugs and crustaceans.
22 February 2011, 12:25 PM ET
Humans are unique among life on Earth, and much remains a mystery as to how we evolved.
16 February 2011, 01:00 PM ET
The remains of 600-million-year-old organisms, possibly ancient seaweed and worms, have been found in China, and shed light on the evolution of large, complex life.
11 February 2011, 11:14 AM ET
Couple travels the world to map the genetic origin of half-wild dogs.
10 February 2011, 03:07 PM ET
Some still doubt how far from the trees she strayed.
01 February 2011, 11:56 AM ET
Long childhood is part of what makes humans unique, but this extended developmental stage comes with a cost: a risk of cancer and other genetic diseases.
27 January 2011, 09:25 AM ET
Most teachers say they remain wishy-washy on the subject to avoid conflict.
21 January 2011, 03:00 AM ET
Cancer cells of a contagious dog cancer can rejuvenate themselves by stealing the mitochondria, or the cellular "powerhouses", of the cells of its host.
19 January 2011, 04:27 AM ET
Flatworm sperm changes its design when the worm's mating behavior changes, according to a study of 16 species of flatworm.
18 January 2011, 11:15 AM ET
After sex, Macrostomum lignano flatworms suck out unwanted sperm. So, their sperm have bristles to help them stay in place. The sperm of related worms, which don't suck out sperm, have no bristles. This led researchers to conclude sex shapes sperm.
12 January 2011, 03:49 AM ET
The "sonic hedgehog" gene is partially responsible for differentiating between sharks and their relatives, scuba-diving scientists find.
11 January 2011, 12:50 PM ET
A new mathematical modeling study looks at how quickly a gene predisposing people to be religious could spread through the population.
01 January 2011, 11:00 AM ET
bizarre world of extinct and living mammals, fossils and evolution, ranging from huge to tiny and speedy to sloth-like.
30 December 2010, 05:09 AM ET
By reconstructing the brains of extinct birds, researchers could shed light on when birds evolved into flying creatures.
21 December 2010, 11:58 AM ET
Millions of years ago when Antarctica was toasty, these birds already had cold-proof protection.
21 December 2010, 10:02 AM ET
The "African elephant" is actually two species, as evolutionarily different as lions and tigers are from one another.
20 December 2010, 10:27 AM ET
A paleontologist reveals the origins of anatomy for birds, dinosaurs and crocodiles.
20 December 2010, 08:03 AM ET
Dinosaurs long thought to be predatory have been outed as plant-eaters by their anatomical features ⎯ including birdlike beaks.
17 December 2010, 09:39 AM ET
The findings suggest debates over evolution in the classroom will have a long shelf life.
16 December 2010, 07:12 AM ET
Newly-evolved genes are just as crucial to life as ancient ones, according to new research.
07 December 2010, 04:01 AM ET
Snails whose shells coil counterclockwise have trouble hooking up with snails whose shells twist clockwise, study finds.
02 December 2010, 08:06 AM ET
Former physicist Paul Horwitz explores how computers can be used to teach difficult concepts in science and math.
24 November 2010, 03:13 AM ET
All kids go through phases of picky or selective eating. What's normal? What's not? And what should a parent do?
23 November 2010, 10:30 AM ET
Head tilts look good on men and women.