Smart answer:

Your search for Do entangled particles exist in nature returned the following results:

with every other particle

In short, every particle comprising the entire universe is entangled with every other particle.

with each other in pairs in a process known as correlation

Entanglement Particles (such as photons, electrons, or qubits) that have interacted at some point retain a type of connection and can be entangled with each other in pairs, in a process known as correlation .

Source:

Entangled particles exist in nature

Entangled particles exist in nature, but they’re excessively delicate and hard to manipulate.

identical entities that share a common origin and have the same properties

Entangled particles are identical entities that share a common origin and have the same properties.

billions of light-years

Entangled particles can be billions of light-years apart and yet the waveform collapse of one particle can instantaneously determine the state of the distant particle.

in the natural world

However, entangled particles are rarely observed in the natural world.

there is another lesser-known property of particles that is similar in nature, but slightly different.

The idea of entangled particles has been in the news a lot lately as researchers around the world attempt to use the world attempt for various purposes—but there is another lesser-known property of particles that is similar in nature, but slightly different.

Source:

one particle that exists in two places

Entangled particles are essentially one particle that exists in two places.

in a specific way

Entangled particles are created together in a specific way so that their properties, such as energy and momentum, are connected.

another lesser-known property of particles , but slightly different that is similar in nature

The idea of entangled particles has been in the news a lot lately as researchers around the world attempt to use the world attempt for various purposes—but there is another lesser-known property of particles that is similar in nature, but slightly different.

Source:

a property that is correlated

entangled particles have a property that is correlated).

Source:

by their same mathematical relation

Within the lexicon of quantum mechanics, entangled particles are described by their same mathematical relation known as a wavefunction.

Source:

two particles that being created together remain somehow linked in a way that while a given property is not determined in either particle

Entangled particles are two particles that being created together remain somehow linked in a way that while a given property is not determined in either particle, the resolution of this ambiguity will occur at the same time in both particles.

Source:

the pairs of particles whose quantum properties are interacting (and can be described by a common function)

In quantum physics, the entangled particles are the pairs of particles whose quantum properties are interacting (and can be described by a common function), even when they are far apart.

on opposite sides of the universe

According to certain interpretations of the theory, two entangled particles could reside on opposite sides of the universe (billions of light years apart) and a measurement on one will instantaneously affect the other.

Source:

each of us (who are also made up of protons and electrons), and every single object in the universe

Even stranger is how the research shows that each of us (who are also made up of protons and electrons), and every single object in the universe, are entangled in the superposition of each and every other particle.

In fact with another particle, or groups of particles

In fact, every particle may be entangled with another particle, or groups of particles, billions of particles scattered all throughout the universe.

Source:

a single entity that can span the entire universe,

In the same way, entangled particles form a single entity that can span the entire universe, with an internal connection that may be supraliminal or extra-spatial.

Source:

In the same way with an internal connection that may be supraliminal or extra-spatial

In the same way, entangled particles form a single entity that can span the entire universe, with an internal connection that may be supraliminal or extra-spatial.

Source:

in reality relationships among processes

Therefore, all 'particles' (in reality relationships among processes) are entangled, all processes are interrelated, all of the Universe(s)

Source: