Latest Issue 30 Mar 2015 Latest Issue 30 Mar 2015 Getty Images NewsLife Sciences The secret signal in a peacock's tail Peacocks use their tail feathers to emit a sound inaudible to humans. by Belinda Smith News Life Sciences News Life Sciences How a fish slobbered its way to dry land by James Urquhart Mudskippers may help explain how land-based animals learned to eat. News Technology News Technology A better way to capture carbon by Viviane Richter A cheaper and more efficient way to take carbon dioxide out of the atmosphere has been found. Feature Physical Sciences Feature Physical Sciences Hobbit houses and the Moon trick the brain and eye Science can't always explain how optical illusions work. Review Life Sciences Review Life Sciences The passenger pigeon by Bill Condie Cautionary tale of a lost species. News Space News Space Top stories from our news blog by COSMOS editors The most read articles from the Cosmos news blog over the past week.