Freedom on paper is one thing; freedom in practice is another. The Emancipation Proclamation and the 13th Amendment were giant leaps toward liberty—yet the road ahead for formerly enslaved people was long and uneven.

Why do ships float, submarines dive, and balloons rise? It all comes down to buoyancy—the force that pushes up.

Have you ever asked, 'Wait, does that really make sense?' Then you’ve used critical thinking! Learn what logic is, how to ask smart questions, and how to use your brain like a superhero detective.