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

The air on Venus is about 96.5% carbon dioxide, a potent greenhouse gas. All that CO2 leads to a runaway greenhouse effect which has turned Venus into a toxic hellscape. It’s hotter even than the ...

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

Scientists have presented the "first compelling evidence for the existence of lava tubes on Venus." And they're way bigger ...

It’s especially puzzling since Venus is a terrestrial world much like Earth, so much so that it’s considered to be our planet ...

A recent study offers proof of feasibility for using cosmic radiation detectors to discover underground spaces. The detectors ...

Researchers confirm with radar and laser the existence of hidden passages beneath Milan's Sforza Castle, anticipated by Leonardo's sketches.

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

This applies to the Shanghai Outer Ring Tunnel: a major travel artery in China’s largest city, which runs for almost 3 km ...