ScienceStudy Reveals Why Robins Lay Blue Eggs The answer behind why birds lay blue eggs lie in the sun's varying effects, including its harmful ultraviolet radiation. A light blue tint, for instance, allows the eggs to warm without overheating.by Katrina Pascual
ScienceBuilding The Stonehenge Could Have Required Only 20 Persons: Reportby Catherine Cabral-Isabedra