TEHRAN, May 12- Evolution produced the same flightless bird species twice, with each occurrence separated by tens of thousands of years. The phenomena, called iterative evolution , helped bring the flightless rail species back from the dead.
TEHRAN, Apr 09- Life can only recover but so fast in the wake of mass extinctions. According to a new study, evolution imposes a speed limit on the recovery of biodiversity.
TEHRAN, Jan 29 -"This is a real victory for little projects. Our team had less than 0.3 percent of the budget of large international projects," said lead researcher Ko Arimatsu.
TEHRAN, August 27 -In the guts of vertebrates, a thin layer of mucous protects the rest of the body from harmful bacteria. Most invertebrates have an intestinal membrane composed of chitin.
TEHRAN, January 22 -How did life begin on Earth? That is a question pondered by humans for millennia. But while the answer remains elusive, a team of scientists believe they’ve found the key mechanism behind life’s essential ingredient – protein.