Giant pandas have been with us ______ 8 million years.
for
Sea turtles have existed on Earth ______ the time of the dinosaurs.
since
Tigers have lived in the wild ______ thousands of years.
for
Blue whales have roamed the oceans ______ at least 1.5 million years.
for
Orangutans have been part of the rainforest ______ millions of years.
for
Polar bears have survived in the Arctic ______ the last Ice Age.
since
Rhinos have been on this planet ______ about 50 million years.
for
Koalas have been around ______ the time of early humans.
since
Elephants have lived on Earth ______ millions of years.
for
The red wolf has been part of North America’s ecosystem ______ thousands of years.
for
The snow leopard has existed in the mountains ______ prehistoric times.
since
