You may think all fins are the same, but there are many options in the swim and diving communities, including easy slip-on fins, split fins and stiff, "military-style" Rocket or Jet Fins.

Robert Zubrin is best known for his advocacy of the manned exploration of Mars. Zubrin also had a design for interplanetary propulsion called the Nuclear Salt Water Rocket. A nuclear salt-water rocket ...

Build the Best Alka-Rocket Ever—with Science. Move over Mentos and Diet Coke. With an effervescent tablet, a film canister and some water, you’ve got a real-life rocket.

Robert Zubrin’s Nuclear Salt Water Rocket (NSWR) design is a rocket that uses known physics and engineering . There are versions that could reach 7-8% of light speed. The use of low grade uranium ...