Fuel fleas. Fuel fleas are microscopic hot particles of new or spent nuclear fuel. While small, they tend to be intensely radioactive. The fuel particles, the size about 10 micrometers, are a strong source of beta and gamma radiation and a weaker source of alpha radiation.
Bella Cullen(played by Kristen Stewart in the movies). Bella Swan is 18 at the time she's turned into a vampire in Breaking Dawn. She is the central character in the Twilight saga and took the name Cullen when she married Edward Cullen.
In the book The Return: Midnight, Meredith had a twin brother named Cristian. She also tells the group what she really is, which is a vampire hunter-slayer. Meredith's last name Sulez is changed to Fell in the series. She is played by Torrey DeVitto and appears as a recurring character during Season Four.