Russian twists are an excellent exercise to engage the obliques. Sit on the floor with knees bent and feet flat. Lean back ...

If you can look at her hips they're stabilized and only her top half of her body is moving. This exercise is done by doing 3 sets for at least 10 reps and alternating sides.

"In twisted bilayer graphene, at certain 'magic' twist angles, these bands evolve ... mathematically shown that introducing a spatially alternating magnetic field gives rise to additional magic ...

This backbone is composed of alternating sugar and phosphate groups ... sugar-phosphate backbones that run opposite each other and twist together in a helical shape. The sugar-phosphate backbone ...