Infantile amnesia, also known as childhood amnesia, is the inability of adults to recall episodic memories from the first few years of life, typically before the age of two to four. This phenomenon is characterized by a scarcity or absence of autobiographical memories from early childhood, despite evidence that infants and young children are capable of forming memories.

Yawning, a common reflex that lasts about 4-7 seconds, remains a mysterious phenomenon despite centuries of scientific inquiry. While theories abound, from brain temperature regulation to social bonding, researchers have yet to reach a consensus on the exact purpose of this involuntary action that begins in the womb and continues throughout our lives.

The Grandfather Paradox, a classic thought experiment in time travel, illustrates the logical contradictions that could arise if one were to journey into the past and alter events crucial to their own existence. This mind-bending concept, which emerged in early 20th-century science fiction, continues to captivate scientists, philosophers, and pop culture enthusiasts, sparking debates about causality, free will, and the nature of time itself.

Jamais vu, often described as the opposite of déjà vu, is a psychological phenomenon where familiar things suddenly feel unfamiliar or strange, offering insights into the complexities of human cognition and memory. From its induction in laboratory studies that earned the 2023 Ig Nobel Prize for Literature to its neurological underpinnings and clinical relevance in conditions like epilepsy and dementia, jamais vu reveals the intricate interplay between perception, recognition, and brain function.