Nor of the unseen is he a tenacious concealer .

Nor of the unseen is he a tenacious concealer .

And he is of the unseen not a tenacious concealer .

And he is of the unseen not a tenacious concealer .

And most surely he is tenacious in the love of wealth .

And most surely he is tenacious in the love of wealth .

Often, political leaders and military and security elites have proven as shrewd and tenacious in avoiding justice as they showed themselves cunning and brutal in doing injustice.

Years later, after a great deal of work, this tenacious detective of the mysteries of life discovered the protein that multiplies human cells, which won her the Nobel.

Biologist Robert Full studies the amazing gecko, with its supersticky feet and tenacious climbing skill. But high speed footage reveals that the gecko's tail harbors perhaps the most surprising talents of all.

And then, in one of the most important, tenacious and toughest reservoirs of the polio virus in the world, we found that our vaccine was working half as well as it should have.

The tenacious glass ceiling' is still in place, a barrier between the senior and middle echelons of organisations that is difficult to penetrate, held in place by a range of visible and invisible mechanisms.

Elaine Morgan is a tenacious proponent of the aquatic ape hypothesis the idea that humans evolved from primate ancestors who dwelt in watery habitats. Hear her spirited defense of the idea and her theory on why mainstream science doesn't take it seriously.

This deliberate targeting of vital infrastructure has left the besieged and tenacious people of Aleppo, children, women, men and elderly, without any facilities providing healthcare or a change to save their lives. They now face death which has all along been the aim of the regime that left no method untried to eliminate our resolute people.