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.