Rocks in example sentence
But this has not always been the case, and we know this because ancient rocks have recorded the pivotal moments in Earth's planetary evolution.
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. 
