Iceland has no shortage of natural dangers – volcanic eruptions, glacial floods, scaldingly hot springs and bitterly cold winters. But it is at least one of the few places on Earth where humans don't ...

Are rocks discovered on Mars a sign of potential past life? 科学家在火星上发现的岩石会是生命存在过的迹象吗？ Episode 251013 / 13 Oct 2025 Do these newly discovered rocks mean there was once life on Mars?