1.   DU, a byproduct of uranium enrichment, burns and oxidizes upon impact, creating radioactive particles that are easily inhaled and ingested.

2.   Studies show that radials create particles small enough to become airborne.

3.   To test his suspicion, Williams had to create the particles from radial tires.

4.   New particles will be created from the collisions, which the scientists will examine with the aid of massive detectors several stories tall.

5.   So Perl had to create tau particles in a particle accelerator to study them.

6.   The collisions will create new particles, which scientists will examine with the aid of massive detectors several stories tall.

7.   The first tau particles were probably created in the Big Bang that started the universe, but they have long since disappeared.