According to 18th-century German philosopher Immanuel Kant, our senses are everything, creating our reality for us. The world, according to him, does not have one reality, but as many realities as there are people.

Through our senses, the world available to us is the only world we ever exp...

Our sun is part of a massive collection of stars in the Milky Way galaxy. These hundreds of billions of stars orbit the galaxy’s center. But did you know that there are things that are even bigger orbiting the Milky Way’s center? Other galaxies orbit it too!

These less mass...

Galileo Galilei, a contemporary of Kepler, built a telescope and began fixing its lens on the planets. He made a series of remarkable discoveries: that the moon was not flat and smooth, there were spots on the sun, Jupiter had moons that orbited it, Venus had phases like the moon, which proved th...