Three critically endangered killer whales that frequent B.C.'s waters are now pregnant. That's according to aerial drone research by scientists in Washington state, and it has researchers in B.C. hopeful that the three mothers-to-be will overcome tough odds and help bring their species back from the brink. The three presumed pregnancies were discovered by two scientists in the U.S., Holly Fearnbach and John Durban, who collaborate often with B.C. experts, said the director of Ocean Wise's marine mammals research group. "It's pretty exciting and it's very significant," Lance...…Three critically endangered killer whales that frequent B.C.'s waters are now pregnant. That's according to aerial drone research by scientists in Washington state, and it has researchers in B.C. hopeful that the three mothers-to-be will overcome tough odds and help bring their species back from the brink. The three presumed pregnancies were discovered by two scientists in the U.S., Holly Fearnbach and John Durban, who collaborate often with B.C. experts, said the director of Ocean Wise's marine mammals research group. "It's pretty exciting and it's very significant," Lance...WW…