When you look at a painted object, the color you perceive is actually related to the pigments in the paint, which absorb certain colors of...
Yellow ochre comes from a claystone rich in iron oxides, particularly goethite, an oxide that gives it its typical yellow-orange hue. It forms naturally through...
The spiciness of peppers mainly comes from a molecule called capsaicin. It is found primarily in the small glands near the seeds and on the...
A soap bubble is formed from a thin liquid layer — primarily made up of water and soap — sandwiched between two ultrathin layers of...
The sky is blue thanks to Rayleigh scattering, a physical phenomenon that relates to how sunlight travels through the air. Sunlight contains all visible colors, but not...
Matter is made up of atoms, which contain positive particles (protons) and negative particles (electrons). Electrons move easily from one material to another. When two...
Radioactivity is when certain unstable atoms spontaneously break apart to become stable again, releasing energy in the form of particles or radiation (alpha, beta, or...
Hummingbirds have very atypical wings as they are long and narrow, in addition to being highly flexible at the base. This unique shape allows them...
The weather is anything but calm: it is constantly changing. The atmosphere is in constant motion, with warm air rising, cold air sinking, and humidity...
Our calendar is based on a year linked to the Earth's revolution around the Sun. This duration is actually about 365.2422 days and not exactly...
