scienceabc.com

LQo6m TIL Athletic wheelchairs have slanting wheels because their wider footprint makes them more stable and quick to take tighter turns. They also have better ergonomics and accelerate faster than regular wheelchairs.
4kBD5 TIL that swinging our arms when walking makes us spend less energy and walk faster than if we tried to hold them still.
j6BGp TIL peekaboo can help baby develop coping mechanisms for dealing with separation anxiety.