The cheapest chemical rocket currently flying is the Russian Dnepr rocket ($1000/lb, $2200/kg) Most other commercial rockets are two to four times as expensive. Without cheap access to space it is ...

7. How to Build a Simple Magnetic Accelerator? How do roller coasters work? They work thanks to magnetism and energy conservation, so a series of electromagnets push and pull on the rollercoaster.

Celeste is a bit of a scatterbrain and has misplaced two journals topside while out inspecting raider outposts. For the Arc Raiders Celeste’s Journals, you’ll need to head to the Dam Battlegrounds and ...

South African-born tech entrepreneur Elon Musk unveiled the blueprint for his Hyperloop rapid transportation system today, giving technology enthusiasts a glimpse of what could be possible in the ...