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High textbook costs continue to prove a barrier to college for some students, with some studies showing that many students skip textbook purchases even ...

Gases are a state of matter with no fixed shape or volume. They have a lower density than solids and liquids.

Protists are one of the six kingdoms of life. They are simple eukaryotic microorganisms that do not fall into the plant, animal, bacteria or fungus groups.

As light slowly returns to the Northern Hemisphere, we anticipate brighter days ahead. It’s a good time to consider the wondrous combination of forces that make life on Earth possible. Above all is the sun — the ultimate source of all our energy. But we rely on plants, algae and some bacteria to obtain this energy through photosynthesis.

As light slowly returns to the Northern Hemisphere, we anticipate brighter days ahead. It’s a good time to consider the wondrous combination of forces that make life on Earth possible. Above all is the sun — the ultimate source of all our energy. But we rely on plants, algae and some bacteria to obtain this energy through photosynthesis.