Ordovician cephalopods, corals, bivalves, crinoids, and trilobites. Common grass yellow butterflies Bright orange lichens encrust the

Bright orange lichens encrust the trunk of a tree on a caldera rim

A small boy with bright eyes wearing a summer hat shouts for joy

Overlooking the Melbourne city skyline and the Yarra River at night

A dense forest of Snow Gum and Tea Tree on a summer's day

Forests of Deciduous Beech on the sheer slopes surrounding Lake Wilks

Ordovician cephalopods, corals, bivalves, crinoids, and trilobites. Common grass yellow butterflies Bright orange lichens encrust theOrdovician cephalopods, corals, bivalves, crinoids, and trilobites. Smithsonian Institution National Museum of Natural History, District of Columbia, United States of America.