How many particles are there in the entire universe?
106350
Dumbed-down explanation how scientists know the number of atoms in the universe?
119217
If particles are points, then aren't atoms empty space?
86967
The concept of particle in QFT
89301
Is the total energy of the universe constant?
90148
Does any particle ever reach any singularity inside the black hole?
126730
What is the mass of Photon or Light Particle?
119336
Zero energy universe
79690
What actually are virtual particles?
38703
Do virtual particles actually physically exist?
49673
How many organisms have ever lived on Earth?
98902
How can particles be emitted from particles?
43471
Is there a standard resource that lists all understood particle-particle relationships?
10553
Does the universe have an edge/boundary/barrier? If yes, what is at the edge?
140945
Interstellar dust/matter distribution
78576
How to write “there exists an infinite number of”?
50584
Parallel universes: are there an infinite amount of universes?
53450
What's the avarage temperature of the Universe?