Dinesh's photos with the keyword: Why Evolution is True

Examples of sexual diamorphisms, showing marked difference in the appearance of males and females. Kingdom of Saxony bird of Paradise (Pteridophora alberti), whose males have elaborate head ornaments that are sky blue on one side and brown on the other.

Continental drift explains the evolutionary biography of the ancient tree ‘Glossopteris. Top: the present-day distribution of Glossopteris fossils (shaded) is broken up into pieces distributed among the continents, making it hard to understand. The patterns of glacial scratches in the rocks are likewise mysterious (arrows). Bottom, the distribution of Glossopteris during the Permian period, when the continents were joined in a supercontinent. This pattern makes sense because the trees surrounded the Permian South pole in an area of temperate climate. And the glacial scratches we see today also make sense, as they all pointed away from the Permian south pole

Invasion of the land. An early lobe-finned fish from about 385 million years ago; a land dwelling tetrapod from Greenland, about 365 million years ago; and the transitional form’Tiktaalik roseae,’ from Ellesmere Island, about 375 million years ago. The intermediacy of Tiktaalik’s body form is mirrored by the intermediacy of its limbs, which have a bone structure in between that of the sturdy fins of the lobe-finned fish and the even sturdiest walking mammals: the bone with darkest shading will become our humerus, and the medium- and light-shaded bones will become the radius and ulna, respectively.