Template:Are You Sure/March 29

• ... that physicist and priest Francesco Zantedeschi was among the first to recognize the marked absorption by the atmosphere of red, yellow, and green light?

• ... that mathematician Wilhelm Ackermann discovered the Ackermann function, an important example in the theory of computation?

• ... that mathematician and academic Tullio Levi-Civita contributed to absolute differential calculus (tensor calculus) and its applications to the theory of relativity?

• ... that the Ichneumon, an alien ambassador from the "Spock's Bug" parallel universe, first appeared in "Tribbles for Ichneumon", one of the "Forbidden Episodes" of Star Trek?