Why don't Birds get Electrocuted on Power Cables? (3D Animation) #Shorts

Why don't two magnetic field lines intersect each other?

Why don't two object move towards each other due to gravitational pull between them ?

Universal law of gravitation states that every object exerts a gravitational force of attraction on every other object. If this is true, why don't we notice such forces? Why don't the two objects in a room move towards each other due to this force?

Why are birds and mammals called homeothermal animals?