Venus is often called Earth's "sister planet" because of their similarities in size, mass, and composition. Both are rocky ...

It is uncontroversial that lava tubes - underground tunnels carved out by molten rock – exist on Earth, the moon and Mars. Smaller planets with low gravity tend to form more cavernous tubes, in part ...

The air on Venus is about 96.5% carbon dioxide, a potent greenhouse gas. All that CO2 leads to a runaway greenhouse effect ...

Their huge size is peculiar and has forced scientists to throw out their pet theories on how planetary lava tunnels form.

Lava tubes are familiar on Earth. They form when the surface of a lava flow hardens while molten rock continues to drain ...

Lava tubes are natural tunnels that form beneath solidified lava flows after a volcanic eruption. Lava hardens faster in the top layers of a lava flow, where the molten rock comes into contact with ...

Massive lava-carved tunnels have been confirmed beneath the surface of Venus, providing the strongest evidence yet that the planet's volcanic past created underground networks unlike those ...

Researchers from Peking University create robotic dogs to explore lunar lava tubes, offering potential protection for future ...