1 Plant/Animal Cell Model (interactive) 2  Pumping Heart Cells. 3  Apoptosis (video) 4  Cell Cycle (interactive) 5  Mitosis (interactive) 6  Meiosis (interactive)  Microscopy.
Amtrakâs Acela Express is currently the fastest train in the US, capable of a maximum speed of 150 mph (241 km/h) â although it typically travels at about half that speed. Depending on whose definition you go by, that may or may not qualify it as a high-speed train. Source: State of California (PDF) via Inhabitat.
Kingda Ka is the fastest roller coaster in the United States. It was the fastest coaster in the world for a few years but has since been eclipsed. (It is still the tallest, however.) It's similar to Top Thrill Dragster (although faster), but it feels rougher. If speed is what you are after, Kingda Ka delivers.