life's little mysteries
Plants draw on a suite of pigments to produce energy from sunlight, and in the fall, some become more obvious than others.
The sky's blueness isn't from reflecting the water. Instead, its color has to do with scattered light.
Ancient caves mark the beginning of recorded burial rituals, but there's still so much we don't know about the history of human graves.
Very few gems can withstand the intense pressure of Earth's mantle, but some require it to crystallize.
The leading group is so diverse that it represents one in every three animal species on Earth.
Foxgloves contain digoxin, a drug used to treat cardiac arrhythmia and heart failure that can also be toxic. But can ingesting it cause a heart attack?
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