A cave collapse is a severe and often sudden geological hazard caused by the failure of a roof or wall arch, where massive rocks and debris fall and can block entire passages. Rockfalls are ...

A team of explorers entered a remote cave expecting ordinary limestone tunnels but uncovered something far stranger. Deep inside, they stumbled upon formations and remains that defied explanation.

What happened to prehistoric, dolphin-like marine reptiles when they died? Did they sink or they float until the gases from ...