One of the differences between crayfish and lobster is their size ... Lobsters and crayfish also have vastly different lifespans. Depending on the species, crayfish live for between 3 and 8 ...

However, some species like the squat "lobster" are not true lobsters ... Crawfish, crayfish, and crawdads are all different names for the same animal. They're also called "mudbugs" because ...

Weir and Schluter also noted that the rate of molecular evolution varies significantly among different bird species. Many bird lineages have evolved at a speed relatively close to the average rate ...

Researchers took a closer look at it, tested its DNA and eventually realized they’d discovered a new species: Typhlonida cocoensis, or the Cocos Island squat lobster. A Typhlonida cocoensis ...

There are now at least 13 species of finches on the Galapagos Islands, each filling a different niche on different islands. All of them evolved from one ancestral species, which colonized the ...

A species is a group of organisms that interbreed to produce fertile offspring. Selective breeding is when organisms are deliberately bred so their offspring have the desirable characteristics.