But structures thus indirectly gained, although at first of no advantage to a species, may subsequently have been taken advantage of by its modified descendants, under new conditions of life and newly acquired habits.
— from The Origin of Species by Means of Natural Selection Or, the Preservation of Favoured Races in the Struggle for Life, 6th Edition by Charles Darwin

Moreover when a modification of structure has primarily arisen from the above or other unknown causes, it may at first have been of no advantage to the species, but may subsequently have been taken advantage of by the descendants of the species under new conditions of life and with newly acquired habits.
— from On the Origin of Species By Means of Natural Selection Or, the Preservation of Favoured Races in the Struggle for Life by Charles Darwin

These three great divisions of the higher Martians had been forced into a mighty alliance as the drying up of the Martian seas had compelled them to seek the comparatively few and always diminishing fertile areas, and to defend themselves, under new conditions of life, against the wild hordes of green men.
— from A Princess of Mars by Edgar Rice Burroughs

Hence, although some few animals have varied rapidly in certain respects under new conditions of life, as dogs in India and sheep in the West Indies, yet all the animals and plants which have produced strongly marked races were domesticated at an extremely remote epoch, often before the dawn of history.
— from The Variation of Animals and Plants under Domestication by Charles Darwin

34 ), we can assume all the physiological facts mentioned above, and rest assured that that leaf was growing under normal conditions of light and was act
— from Ancient Plants Being a Simple Account of the past Vegetation of the Earth and of the Recent Important Discoveries Made in This Realm of Nature by Marie Carmichael Stopes

There must be many beautiful children who were conceived from unions which took place under natural conditions of light and open air radiance.
— from Radiant Motherhood: A Book for Those Who are Creating the Future by Marie Carmichael Stopes