LifeFour wings bad, two wings better – for early birds Evidence is mounting that primitive birds initially evolved flight using four wings ¿ìè¶ÌÊÓÆµ
LifeRusty rocks reveal ancient origin of photosynthesis Iron oxide in the world's oldest sedimentary rocks suggest photosynthesis evolved 370 million years earlier than we thought, not long after life began ¿ìè¶ÌÊÓÆµ