A speck in the dimensions of Space and Time
Lately lot of material has found its way in pop culture in form of Books such as Sapiens, UHD Docu-Series on Netflix, Amazon Prime, Gyangurus peddling the idea on whatsapp forwards, Youtube or PBS depending on your choice of Gurus -all trying to remind us / make us realize - I am note alone, We are not alone as Human Beings, We are possibly not alone on Earth and We are certainly not the first ones, the Universe has existed before us for a long time.
How Long? We are thrown certain big numbers which are most of the time difficult to register (as is the case with most big things which are difficult to be processed by human brain) - certainly not when given as stand alone numbers, may be for sometime if given in a relative sense to something else. Here is an image trying to give a relative sense that I found Profound:

Image Credit: Book by Author Alanna Collen, 10% Human: How Your Body’s Microbes Hold the Key to Health and Happiness
https://www.amazon.in/10-Human-Microbes-Health-Happiness-ebook/dp/B00O0FY5TI