“The Sacred Flame, or Flame of Life, was the heat source that created the life-prolonging Elixir...Sacred Flame
“Praxis gas was a type of gas in the praxis range. Celery would turn purple in praxis gas. The...Praxis gas
“In theory, Stahlman's gas, named in honour of Professor Stahlman, was a source of energy found...Stahlman's gas
“Nitrosyl chloride composed 25% of the 456 atmosphere. (TV: Children of Earth: Day Two)Nitrosyl chloride
“The Twelfth Doctor claimed to know of a race made of sentient gas who threw fireballs as a...Sentient gas
“Mustard gas was an offensive weapon used on Earth in at least World War I. (PROSE: The Mark of...Mustard gas
The following 41 pages are in this category, out of 41 total.