Gravity is one of nature’s greatest wonders, though we cannot see it with our eyes. It is the invisible force that pulls everything toward the Earth. When an apple falls from a tree, or when we walk without floating away, it is gravity at work.

The great scientist Sir Isaac Newton first explained gravity after observing a falling apple. Later, Albert Einstein expanded the idea, showing that gravity is the bending of space and time.

Gravity not only keeps us on the ground, but also keeps the Moon circling the Earth, the Earth revolving around the Sun, and the stars bound together in galaxies. Without gravity, the universe would be scattered chaos.

Truly, gravity is silent yet mighty—an unseen thread that ties the cosmos into one harmonious whole.