Search results for “Limes”

Hadrian's Wall and Limes

The Roman Empire defines its borders. Hadrian's Wall in Britain and the approximately 550-kilometer-long Limes in Germania are imposing security systems against unwanted immigrants and hostile attacks. Author: ZDF/Terra X/ Story House Productions/ Sigrun Laste/ Jürgen Rehberg, André Götzmann/ Oliv

What is a stromatolite

Stromatolites are calcareous deposits. The stones can be up to 3.5 billion years old. For a long time they were known only as fossils, until 1956, when a "living" colony of stromatolites was discovered off the west coast of Australia. Author: ZDF/Terra X/Viking Film/Iris Gesang/Andreas Kieling, Fra