January 22, 2019

Why do volcanoes blow their tops?

Earth’s crust rides on a sea of molten rock called magma, which bubbles to the surface wherever two plates meet. Earthquakes work like pressure valves for […]
January 22, 2019

Why do Earthquakes happen?

The ground beneath your feet might feel as solid as a rock, but it’s actually moving every minute of every hour of every day. Earth’s crust […]
January 19, 2019

Why are leaves green?

The green color in leaves and blades of grass comes from a pigment called chlorophyll, which absorbs sunlight during photosynthesis, one of the most important natural […]
January 19, 2019

Why can’t I drink seawater?

Consider seawater’s awful taste a warning: It contains more salt than your cells and organs can handle. Ocean water is nearly four times saltier than the […]