Why You Cannot Sink In The Dead Sea

Swimming in the Dead Sea feels less like floating and more like resting on a solid mattress. The water is nearly ten times saltier than the ocean, creating a density that makes it physically impossible for a human to sink beneath the surface.

Normal seawater is about 3.5% salt, but the Dead Sea sits at roughly 34%. This high mineral content makes the water much denser than the human body. Because you displace a volume of water that weighs significantly more than you do, the upward buoyant force pushes you to the top with aggressive strength.

You cannot perform a traditional swimming stroke because your limbs pop out of the water like inflatable toys. Even trying to stand upright is a struggle; the water pushes your feet toward the surface, making you flip onto your back or stomach involuntarily.

This extreme salinity creates a lethal environment for almost all life, giving the sea its name. No fish or plants can survive the osmotic pressure, which sucks the water out of living cells instantly.

However, this density has a dangerous side effect: if you do manage to flip onto your face, the water’s weight makes it nearly impossible to turn back over, leading to a strange risk of drowning in water you cannot sink into.