| The clusters smashed together thousands of galaxies and trillions of stars. |
| Galaxies are composed of billions to trillions of stars, as well as gas, dust, and dark matter, all bound together by gravity. |
| Some 70 million baby boomers will soon draw down trillions in government payments. |
| When it comes to simple arithmetic, involving trillions of dollars of workers' Social Security money, the privatizers flunk the test. |
| Scientists have long known that the human body coexists with trillions of individual germs, what they call the microbiome. |
| He explains the roles of the genomes of trillions of microbes in and on our bodies. |
