This required several things coming together: natural uranium deposits ... that the missing U-235 was fissioned away in a natural nuclear reactor. In particular, all five fission products you ...

Like uranium 235, element 94 would be an incredibly powerful ... achieved a controlled and sustained nuclear fission chain reaction. During the last months of the war, a small group of scientists ...

Central to this phenomenon was the concentration of uranium-235 (U-235), a naturally ... down the neutrons released from fission so they can sustain a chain reaction at a controlled rate.

In order to produce fuel for certain types of nuclear reactors and nuclear weapons, uranium has to be "enriched" in the U-235 isotope, which is responsible for nuclear fission ... in drinking water ...

Scientists have discovered that a piece of uranium extracted from an African mine is a two billion-year-old natural nuclear ...

While straightforward and in use since the 1950s in commercial settings, they are also essentially limited to uranium (U-235) fuel ... during a nuclear fission chain reaction, effectively slowing ...