Can a Circle Be a Straight Line? | Space Time | PBS Digital Studios Can a Circle Be a Straight Line? | Space Time | PBS Digital Studios begin-post-stats PBS Space Time • 997K views end-post-stats begin-duration 10:22 end-duration Math topics: _Elementary_geometry_##Elementary geometry##_Perpendicular_##Perpendicular##_Tangent_##Tangent##_Line_segment_##Line segment##_Parallel_(geometry)_##Parallel (geometry)##_Topology_##Topology##_Space_##Space##_Tangent_space_##Tangent space##_Curve_##Curve##_Riemannian_geometry_##Riemannian geometry##_Parallel_transport_##Parallel transport##_Geodesic_##Geodesic##_Great_circle_##Great circle##_Surfaces_##Surfaces##_Sphere_##Sphere##_Cylinder_(geometry)_##Cylinder (geometry)##_Surface_##Surface Other topics: _Physics_##Physics##_Minkowski_space_##Minkowski space##_Spacetime_##Spacetime##_Time_dilation_##Time dilation##_Vectors_(mathematics_and_physics)_##Vectors (mathematics and physics)##_Vector_space_##Vector space##_Tangent_vector_##Tangent vector##_Euclidean_vector_##Euclidean vector##_Euclidean_geometry_##Euclidean geometry##_Flat_(geometry)_##Flat (geometry)##_Euclidean_space_##Euclidean space##_Plane_(geometry)_##Plane (geometry)##_Albert_einstein_##Albert einstein##_General_relativity_##General relativity##_Special_relativity_##Special relativity##_Albert_Einstein_##Albert Einstein##_Gravitation_##Gravitation##_Inertial_frame_of_reference_##Inertial frame of reference##_Orbit_##Orbit##_Gravity_##Gravity video-id: D3GVVkPb3OI channel_PBS_Space_Time_ So What Learning Albert einstein , Elementary geometry , Euclidean geometry , Gravitation , Physics , Riemannian geometry , Surfaces , Topology , Vectors (mathematics and physics) Monday, January 22, 2018 Share Share