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25 articles · science · page 1 / 2
Plants use sunlight, water, and air to produce their own food through a process called photosynthesis.
Water on Earth moves in a continuous loop between the surface, the sky, and back again.
The sky looks blue because sunlight scatters when it passes through the atmosphere.
Magnets attract certain metals because of an invisible force called a magnetic field.
Earth is made of several distinct layers, each with different materials and temperatures.
Sleep is essential for the brain and body to repair themselves and process information from the day.
Rainbows appear when sunlight enters water droplets in the air and splits into its different colors.
Gravity is the force of attraction between objects with mass, and it shapes everything from falling apples to planetary orbits.
The heart is a muscular pump that keeps blood flowing to every part of the body.
DNA is the molecular instruction manual inside every cell that determines inherited traits and guides the building of living organisms.
The solar system consists of the Sun and everything that orbits it, from eight planets to countless smaller bodies.
An ecosystem is a community of living organisms interacting with each other and their physical environment through flows of energy and nutrients.
Vaccines train the immune system to recognize and fight specific pathogens without causing the disease they protect against.
Earth's outer shell is divided into moving plates whose interactions create mountains, earthquakes, and volcanoes.
The speed of light is a fundamental constant of nature that sets an ultimate limit on how fast information and matter can travel.
The immune system is a complex network of cells, tissues, and organs that defends the body against harmful pathogens and diseased cells.
A black hole is a region of space where gravity is so strong that nothing, not even light, can escape its pull.
Quantum mechanics describes the behavior of matter and energy at the subatomic scale, revealing a world governed by probability and wave-particle duality.
CRISPR-Cas9 is a molecular tool derived from bacterial immune systems that allows scientists to edit DNA sequences with unprecedented precision.
The carbon cycle describes how carbon moves between the atmosphere, oceans, land, and living organisms, and human emissions have significantly altered this balance.
Neuroplasticity is the brain's lifelong capacity to reorganize its neural connections in response to experience, learning, and injury.
Natural selection is the process by which heritable traits that enhance survival and reproduction become more common in a population over successive generations.
Antimicrobial resistance arises when microorganisms evolve mechanisms to survive drugs designed to kill them, threatening the effectiveness of modern medicine.
Dark matter and dark energy are two mysterious components that together account for roughly 95 percent of the total content of the universe, yet neither has been directly detected.