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The nature of consciousness remains unclear: how subjective experiences arise from brain activity is unexplained. Invisible ...

The world is filled with ancient unexplained mysteries that capture the imagination, challenging scientists, scholars, and visitors alike. Archeologists attempt to identify and explain the purpose ...

From the ancient Phaistos Disk to the CIA's own Kryptos challenge, generations of experts have tried and failed to unlock the mysteries of ... solve a decades-old unsolved murder.

Even more appealing, these mysteries are presented to the reader ... captivating story, and unsolved mathematical challenges that range from geometry to number theory and more.

Here are five unsolved mysteries you can actually visit and ponder over, each offering a doorway into the unexplained. Taos Hum, New Mexico, USA Ever had that strange feeling when you hear ...