A video of an octopus changing colors while it sleeps is raising a lot of questions about the mysterious sea creatures. The footage aired in the new PBS documentary titled "Octopus: Making Contact." ...

Octopuses are remarkably intelligent, oftentimes comparable to critical thinking exhibited by humans, particularly that of a 3-year-old. While these cephalopods are still under research, their ...

This dive captures an octopus making physical contact. The animal responds instinctively, not aggressively. Tentacles grip with surprising strength. The diver remains calm to avoid escalation. Marine ...