( ( The Times ) ( ( said ( ( the scientists ) ( ( ( ( believes `` ) ( that ( ( space travel ) ( ( would not ) ( solve ( ( the problems ) ( of overpopulation ) ) ) ) ) ) ) , ) ( but ( without ( colonizing ( ( other ( planets humans ) ) ( presented ( with ( ( the possibility ) ( of ( becoming extinct ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNPS Times)) (VP (VBD said) (SBAR (S (NP (DT the) (NNS scientists)) (VP (VBZ believes) (`` ``) (SBAR (IN that) (S (NP (NN space) (NN travel)) (VP (MD would) (RB not) (VP (VB solve) (NP (NP (DT the) (NNS problems)) (PP (IN of) (NP (NN overpopulation)))))))) (, ,) (PP (CC but) (PP (IN without) (S (VP (VBG colonizing) (NP (NP (JJ other) (NNS planets) (NNS humans)) (VP (VBN presented) (PP (IN with) (NP (NP (DT the) (NN possibility)) (PP (IN of) (S (VP (VBG becoming) (ADJP (JJ extinct))))))))))))))))) (. .)))
The Times said the scientists believes &quot;that space travel would not solve the problems of overpopulation, but without colonizing other planets humans presented with the possibility of becoming extinct.
(ROOT (S (NP (NNP Human) (NNP overpopulation)) (VP (VBZ is) (VP (VP (VBG crowding) (PRT (RP out)) (NP (JJ other) (NNS species))) (CC and) (VP (VBG making) (S (NP (NP (PDT all) (DT the) (JJ other) (NNS causes)) (PP (IN of) (NP (NN extinction)))) (ADJP (RBR worse)))))) (. .)))