Ukraine's President Volodymyr Zelenskyy speaks during the Munich Security Conference at the Bayerischer Hof Hotel in Munich, ...

New Research Explores Volcanic Caves, Advancing the Search for Life on Mars Nov. 18, 2024 — Through the intricate study of lava tubes -- caves formed following volcanic eruptions when lava cools ...

Ukrainian President Zelensky says he hasn't received an invite for Saudi-hosted talks. He finds it strange to discuss ...