Source: NASA Astrobiology Beginning two billion years of Earth’s history, the amount of oxygen was not sufficient, but rich in carbon dioxide and methane. The early forms have been able to generate metabolic energy from sunlight using the ‘purple’ pigment, predating the evolution of chlorophyll and photosynthesis. The pigment called retinal, if evolved, could absorb […]
One of the biggest discoveries made in the world of gems has come to light in Sri Lanka, and it is known by the name of ‘Star of Pure Land.’ This natural purple star sapphire weighs 3,536 carats, making it one of the biggest gems of its time. The discovery has been revealed for the […]
US President Donald Trump at an event to mark National Purple Heart Day (Image credits: AP) US President Donald Trump honored nearly 100 Purple Heart recipients at the White House on Thursday during a ceremony in the East Room marking National Purple Heart Day.Trump opened the event by recognizing the veterans in attendance and expressing […]
