Reference Terms
from Wikipedia, the free encyclopedia
Blindness
Blindness can be defined physiologically as the condition of lacking visual perception.
Note: The above text is excerpted from the Wikipedia article "Blindness", which has been released under the GNU Free Documentation License.
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May 16, 2025
May 16, 2025 — Researchers have found that wild orangutans vocalize with a layered complexity previously thought to be unique to human communication, suggesting a much older evolutionary ...
May 14, 2025 — The origin of reptiles on Earth has been shown to be up to 40 million years earlier than previously thought -- thanks to evidence discovered at an Australian fossil site that represents a critical ...
May 14, 2025 — The northern white rhinoceros is one of the rarest animals on Earth, with just two females left and no natural way for the species to reproduce. Now, scientists have mapped the entire genome of a ...
May 14, 2025 — Archaeopteryx is the fossil that clearly demonstrated Darwin's views. It's the oldest known fossil bird, and it helps show that all birds -- including the ones alive today -- emerged from dinosaurs. ...
Latest Headlines
updated 12:56 pm ET
May 15, 2025 — Having school dinners rather than packed lunches could encourage picky eating 13-year-olds to eat a wider variety of foods, according to a new ...
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May 15, 2025 — The Amazon rainforest may be able to survive long-term drought caused by climate change, but adjusting to a drier, warmer world would exact a heavy toll, a study ...
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May 15, 2025 — A new study shows that seagrass ecosystems along the northern half of Florida's Gulf Coast have remained relatively healthy and undisturbed for the ...
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May 16, 2025 — Intakes of dietary fiber and high-quality carbohydrates in midlife are linked to increased likelihood of healthy aging and other positive health outcomes in older women. Higher intakes of refined ...
May 16, 2025 — In the natural world -- where predators pounce, prey flee, and group members feed and sleep in solidarity -- animal behavior is glorious in its variety. Now, new research suggests there may be an ...
May 15, 2025 — When trees and soil fungi form close associations with each other, both partners benefit. Many tree species have further enhanced this cooperation by forming a concurrent symbiosis with two different ...