Evolution is often perceived as an incredibly slow, natural process driven by environmental pressures over millennia. That characterization certainly holds true, but humans have also repeatedly ...

Introduction : celebrating and understanding reproductive diversity / Janet L. Leonard -- The distinction between primary and secondary sexual characters / Michael T. Ghiselin -- The evolution of ...

Animals, from worms and sponges to jellyfish and whales, contain anywhere from a few thousand to tens of trillions of nearly genetically identical cells. Depending on the organism, these cells arrange ...

In " origin of species" written by Charles Darwin, organisms are constantly changing to adapt to the environment by natural selection, it is said that species diverge and various species occur. This ...

Scientists have discovered a billion-year-old fossil in the Scottish Highlands that could reveal a new link in the evolution of animals. The microfossil was unearthed by a team of researchers, led by ...

Evolution difference, animal adaptation, and climate influence are major factors that explain why animals from the Northern and Southern Hemispheres look, behave, and survive differently. Each ...