If a Tendon Raises Up When You Touch Your Pinky to Your Thumb, Here’s What It Could Mean

Similarly, the defensive posture adopted by frightened animals, such as a cat’s puffed-up appearance, is another example of an ancient survival strategy. By exaggerating their size, these creatures sought to deter potential predators. Though this tactic may be less effective in today’s world, it remains an ingrained behavioral pattern.

However, perhaps the most striking evidence of evolution lies within our own limbs. A significant portion of the human population—approximately 10 to 15%—lacks a tendon that once played a crucial role in our primate ancestors. This tendon, connected to the palmaris longus muscle, was essential for arboreal dwellers like lemurs and monkeys, aiding in their acrobatic feats among the branches.