Scientists land a big fish: How did sea life evolve into land animals? A new fossil find may hold the answerJim Ritter
How did genes related to walking first evolve? The little skate (Leucoraja erinacea) is a cartilaginous fish related to rays and sharks (as opposed to bony fish, including sarcopterygians). It is another fish that “walks” underwater on fins like legs, mimicking the movements of land-based...
How can two seemingly unrelated species that live in isolation from each other evolve into identical forms? Extinct Animals Are Snakes With Legs a Real Thing? Life Science 10 Physical Human Traits That Evolution Has Made Obsolete Wild Animals How Did Snakes Lose Their Legs? The World If We...
How do fish and amphibians reproduce? How are birds and amphibians different from one another? How do amphibians eat? What adaptations helped amphibians evolve into land animals? Frog lungs are poorly developed. How does this relate to their skin being thin and moist?
The ancestors of whales lived on land -- there is evidence of the evolution of the whale from life on land to life in the sea (read How Whales Work for details), but how and why did this happen? The "why" is commonly attributed to the abundance of food in the sea. Basically, whal...
Did mammals evolve from reptiles or amphibians? How do amphibians change sex? What kind of animals evolved from amphibians? What are three adaptations frogs have that make them amphibians? What adaptations helped amphibians evolve into land animals? How are fish, amphibians, reptiles and birds diffe...
Like other species, we are the products of millions of years of adaptation. Now we're taking matters into our own hands.
Did bear species ever migrate between continents? Yes, bear species did migrate between continents. For instance, it’s believed that ancestors of the American black bear migrated to North America from Asia via theBering land bridgeduring the Ice Ages. ...
One of the biggest questions in evolution is when and how major groups of animals first evolved. The rise oftetrapods(all limbedvertebrates) from their fish relatives marks one of the most important evolutionary events in the history of life. This “fish-to-tetrapod” transition took...
protein (for more, see “Climate math: What a 1.5-degree pathway would take.”) The agricultural sector has a major role to play by meeting the world’s animal-protein needs with fewer, healthier animals that generate lower emissions from enteric fermentation and by improving manure management....