When we transitioned to a species that relies so heavily on cognitive abilities, we became the most powerful and profoundly weird creatures of all ti… - Guy P. Harrison

Isaac Newton would be the easy answer [for greatest scientist ever]. But I'll go with a hominin, probably two million years or so ago, who first confronted fire like a scientist. He or she observed the flames, thought about it, formulated an hypothesis, experimented perhaps, and then came up with a theory of fire. That person, so long ago, was doing science. That person approached fire, a dangerous phenomenon, and dared to control it. That was science in action. And it changed us forever. With fire in our minds and torches in our hands, we were no longer prey, no longer lost in the darkness of every night. If we one day spread our intelligence throughout the universe, it will all trace back to that hominin and that moment.

It's never too late to think.

Appreciate the magnificent brain you possess. Protect and nurture it. Strive to be a good skeptic and critical thinker so that fewer hours of your precious life will be squandered on dead-end beliefs. Always try to think like a scientist so that you might better know truth from fiction.