| Query | User |
|---|---|
| lincoln and kennedy | entered by user 443881 |
| lincoln and kennedy's assassination | entered by user 6663418 |
| perpetual motion | entered by user 1170287 |
| perpetual motion | entered by user ditto |
| perpetual motion ball machine | entered by user 2433983 |
| perpetual motion machine | entered by user 800724 |
| perpetual motion machine | entered by user ditto |
| perpetual motion machines | entered by user 15514089 |
| tornadoes experiments | entered by user 5553438 |
| www.tornado models.com | entered by user 1639895 |
| www.tornado models.com | entered by user ditto |