... have to place in order, and determine the true position each originally occupied with regard to the others, the whole difficulty of the true Natural ...
... of the Palozoic period, and then a decreasing violence or rapidity through the Secondary period, to allow for the gradual repopulation of the earth ...
... can only be balanced by a difference in the population which have to exist in a given area-we shall be in a condition to proceed to the consideration ...
... young of which are especially obnoxious to danger, and we find accordingly a variety of curious contrivances to protect them. We have nests carefully ...
... the white butterflies forming the family Pierid (many of which do not greatly differ in appearance from our own cabbage butterflies) is a genus of rather ...
... there exist a number of species which it would be advantageous for others to resemble, since they are armed with the most fatal weapons of offence. ...
... and Lycosa sp.), but in the former case they were cut out and allowed to drop in the latter, after disappearing in the jaws of their captor down his ...
... origin, the constant transmission of some characteristic peculiarity of organization, we have a definition which will compel us to neglect altogether ...
... variation and distribution of insects. Yet he has shown that many species of Lepidoptera, which before offered no special difficulties, are in reality ...
... It is natural to conclude, therefore, that they have some hidden property which saves them from attack and it is easy to see that when any other ...
... of the district that seems marvellous to a civilized man but my own observation of savages in forest countries has convinced me, that they find their ...
... can most easily obtain, with the very simplest adaptations of means to an end, quite within the mental capacities of birds. The delicacy and perfection ...
... to speed. We find, therefore, that a very large mass of facts relating to the sexual colouration and the mode of nidification of birds, including ...
... opponents) maintains, that He has personally applied general laws to produce effects, which those laws are not in themselves capable of producing ...
... The theory of continual interference is a limitation of the Creator's power. It assumes that he could not work by pure law in the organic, as he has ...
... on Brazilian mountains, had, even in the very infancy of the human race, some traces of the same peculiar and characteristic type of cranial formation ...
... it is that, judging from the head and brain, Professor Owen places man in a distinct sub-class of mammalia, while as regards the bony structure of his ...
... brain of the anthropoid apes scarcely amounts to one-third of that of man, in both cases taking the average or the proportions may be more clearly represented ...
... Hence he terms it the matter of life, and believes that all the physical properties of organized beings are due to the physical properties of protoplasm. ...
... both the United States and the United Kingdom.Alfred Russel Wallace : Is Mars HabitableIs Mars Habitable by Alfred Russel Wallace. Alfred Russel ...