Diaz-Flores Caminero, a doctoral student who co-wrote the first paper on the concept, welcomes the challenge. But I think the same complexity is what makes them beautiful, he said. University doctoral candidate Alvaro Diaz-Flores Caminero and undergraduate student Claire Pedersen were the lead authors of the paper. Scientists have begun to lay plans for repopulation, starting with a sperm bank  on the moon. Jekan ThangaThe so-called ark, according to Thangas presentation, would then cryogenically preserve various species in the event of global disaster.
Repopulation is impossible sang the professor.
( z0 sing :ARG0 ( z1 professor ) :ARG1 ( z2 possible :ARG1 ( z3 reproduce ) :polarity - ) )
(z0 / sing-01
    :ARG0 (z1 / professor)
    :ARG1 (z2 / possible-01
              :ARG1 (z3 / reproduce-01)
              :polarity -))
Repopulation is impossible sang the professor .
z2 :polarity 0
z2 :ARG1 z3
z0 :ARG1 z2
z0 :ARG0 z1