«There are still a huge number of uncertainties surrounding this trial,» says Dennis Burton, an immunologist at the Scripps Research Institute in La Jolla, Calif.. (scientificamerican.com)
«Although there are an enormous number of uncertainties involved, the hypothesis is very interesting and worth exploring more.» (space.com)
The central bank raised rates in July and September for the first time in seven years but has since worried about a number of uncertainties that could have an impact on the economy, including renegotiation of the North American Free Trade Agreement. (business.financialpost.com)