Why Earth is not a cuboid?
14177
Is it possible to prove that planets should be approximately spherical using the calculus of variations?
150707
Prove the statement 'World is not flat'
3546
Total angular momentum of earth
86233
A $3 \times 3 \times 3$ cube has no Hamiltonian path starting at the corner.
60730
Why is air not sucked off the Earth?
2348
Show that the sphere, S, and $\mathbb{R}^2$ is not homeomorphic
143720
Why is there a temperature gradient on Earth?
93797
Should not we apply pseudo-forces all the time as the Earth is a non-inertial frame of reference?
95221
Is the cuspidal cubic $\{y^2 = x^3\} \subset \Bbb R^2$ not smooth?
145542
Why Is Most Life Symmetrical Externally But Not Internally?
103284
Why does a bubble take a spherical shape?
143165
Why are angles dimensionless and quantities such as length not?
73931
Why did the original-Earth have continents that resembled the ones on the final-Earth?
22749
Why does Earth have two stargates?
111891
The Earth is spinning, so why don't we jump and land on a different location?
3617
Why doesn't the Moon fall onto the Earth?
129542
Do perfect spheres exist in nature?