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Have you ever felt like you're really a fish?
The famous phrase has it that evolution is a process of the “survival of the fittest.” However, it should be noted that this doesn’t imply some great evolutionary gymnasium, with species pumping and sculpting themselves into the most sexually appealing shapes of the day.
Home Support for PBS Video provided by PBS NewsHour Mammoth Amount of Ice Age Fossils Found in Colorado
I’m sure that most of us think that marine fish evolved in the sea, but a new paper by Greta Vega and John Wiens in the Proceedings of the Royal Society (B) says that that just ain’t so.
The term “evolution” is commonly thought as the process that leads to diversification of species or to gradual change in certain characteristics of living organisms.
<img class="aligncenter size-full wp-image-82033" title="leshyk_permian" src="http://www.wired.com/images_blogs/wiredscience/2011/10/leshyk_permian.jpg" alt="" width="660" height="413" /> When searching for causes of Earth’s mass extinctions, scientists instinctively turn to geophysical calamities: erupting volcanoes, methane bursts, asteroid strikes and other obvious dooms. But in the most massive extinction of all, when most of everything that lived died out some 250 million years ago, a more subtle form of destruction has been suggested.
The dodo ( Raphus cucullatus ), an extinct flightless relative of the pigeon has today come to symbolize the stupid, clumsy or obsolete.
Aug 24, Other Sciences/Archaeology & Fossils Life restoration of the nocturnal mammal Juramaia, hunting insects on a tree fern. Credit: Mark A.
Aug. 24, 2011 — A remarkably well-preserved fossil discovered in northeast China provides new information about the earliest ancestors of most of today's mammal species -- the placental mammals. According to a paper published August 25 in the journal Nature , this fossil represents a new milestone in mammal evolution that was reached 35 million years earlier than previously thought, filling an important gap in the fossil record and helping to calibrate modern, DNA-based methods of dating the evolution.