Earth's lifespan condensed into one day: then we've been here for three seconds. - If we're going to make it to the fourth second, time is now crucial. - Of note: Earth is about 4.54 billion years old (1) and our "Anatomically Modern Homo Sapiens" are about 140-300 thousand years old (2). The 'three-seconds' mentioned… Continue reading 3 Seconds
