Rocks in example sentence
The rocks here are 3.5 billion years old, and they contain some of the oldest evidence for life on the planet.
More example sentences with word rocks
And what starts happening is that, around young suns, young stars, all these elements combine, they swirl around, the energy of the star stirs them around, they form particles, they form snowflakes, they form little dust motes, they form rocks, they form asteroids, and eventually, they form planets and moons. 
