Neuroscience

Study explains how light could activate neurons

Human brains have an average of 86 billion neurons. These nerve cells are interconnected at junctions known as synapses, and some neurons have as many as 10,000 such synapses. A key to understanding brain function is to have ...

Oncology & Cancer

Targeted elimination of leukemic stem cells

Leukemia is caused by leukemic stem cells which are resistant to most known therapies. Relapses are also due to this resistance. Leukemic stem cells arise from normal blood-forming (hematopoietic) stem cells. Because they ...

Vaccination

Johnson & Johnson files for EU vaccine approval

US pharmaceutical giant Johnson & Johnson has applied for authorisation for its coronavirus vaccine in the EU with a decision possible by the middle of March, Europe's drugs regulator said Tuesday.

Diseases, Conditions, Syndromes

Germany plans free antigen tests for all from March

Germany is to offer free COVID-19 antigen tests for all from March, Health Minister Jens Spahn said Tuesday, as the country cautiously began allowing some children to return to schools.

Psychology & Psychiatry

Sleep keeps teens on track for good mental health

As families settle back into a new school year, sleep experts at the University of South Australia are reminding parents about the importance of teenagers getting enough sleep, cautioning them that insufficient sleep can ...

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Light

Light is electromagnetic radiation, particularly radiation of a wavelength that is visible to the human eye (about 400–700 nm, or perhaps 380–750 nm.) In physics, the term light sometimes refers to electromagnetic radiation of any wavelength, whether visible or not.

Three primary properties of light are:

Light, which exists in tiny "packets" called photons, exhibits properties of both waves and particles. This property is referred to as the wave–particle duality. The study of light, known as optics, is an important research area in modern physics.

This text uses material from Wikipedia, licensed under CC BY-SA