This historical concept of race has faced substantial scientific and philosophical challenge, with some important thinkers denying both the logical coherence of the concept and the very existence of races.
Until recently, this alternative has received little attention, and there remains substantial scientific uncertainty associated with the technological challenges and environmental risks of storing CO2 in this manner [13, 44].
Sceptics worry that its success on incremental, scientific challenges may not extend to broader, more substantial innovation because the research culture in most firms is incapable of posing the right questions or knowing what to do with the sort of answers produced by InnoCentive's solvers.A recent innovation may help.
However, some substantial scientific barriers remain, especially regarding the personalized medicine nature of the strategy and the challenge of delivering to all affected tissues in DMD.
The cumulative effect of this 'lost decade' of debate, discussion, and deliberation was a substantial exacerbation of the risk, cost, and time it took to develop new antibiotics, just at the time when scientific challenges and other economic realities were having the same effect.
This lack of organization comes at substantial cost to the Earth-surface science community (i.e., geomorphologists, sedimentary geologists, and engineers) through missed opportunities to address scientific challenges.
The findings raise new scientific challenges.
Scientific challenges morph into political challenges that lead to social challenges.
"We conclude the study has substantial scientific deficiencies," wrote the authors.
He does original music composition and he's also done some substantial scientific research".
