Oncology & Cancer

Climate change threatens progress in cancer control

Climate change threatens prospects for further progress in cancer prevention and control, increasing exposure to cancer risk factors and impacting access to cancer care, according to a new commentary by scientists from the ...

Health

Nutritionist shares tips for feeding kids while stuck at home

Balancing finicky kid appetites with proper nutrition can be a challenge in the best of times. But now, with the majority of schools and day cares closed across Pennsylvania, many parents working from home, and schedules ...

Diseases, Conditions, Syndromes

Coronavirus could become seasonal: top US scientist

There is a strong chance the new coronavirus could return in seasonal cycles, a senior US scientist said Wednesday, underscoring the urgent need to find a vaccine and effective treatments.

Diseases, Conditions, Syndromes

As coronavirus myths multiply, experts sort fact from fiction

(HealthDay)—The new coronavirus continues its steady march through the U.S. population, bringing with it a second plague: potentially dangerous myths and rumors about COVID-19, spread via the internet.

Diseases, Conditions, Syndromes

Fact vs. Fiction: COVID-19

Finding reliable, accurate information about the novel coronavirus COVID-19 is becoming more convoluted each day, especially when it comes to social media. With an overwhelming amount of information, it can be difficult to ...

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Weather

Weather is a set of all the phenomena occurring in a given atmosphere at a given time. Weather phenomena lie in the troposphere. Weather refers, generally, to day-to-day temperature and precipitation activity, whereas climate is the term for the average atmospheric conditions over longer periods of time. When used without qualification, "weather" is understood to be the weather of Earth.

Weather occurs due to density (temperature and moisture) differences between one place and another. These differences can occur due to the sun angle at any particular spot, which varies by latitude from the tropics. The strong temperature contrast between polar and tropical air gives rise to the jet stream. Weather systems in the mid-latitudes, such as extratropical cyclones, are caused by instabilities of the jet stream flow. Because the Earth's axis is tilted relative to its orbital plane, sunlight is incident at different angles at different times of the year. On Earth's surface, temperatures usually range ±40 °C (100 °F to −40 °F) annually. Over thousands to hundreds of thousands of years, changes in Earth's orbit affect the amount and distribution of solar energy received by the Earth and influence long-term climate

Surface temperature differences in turn cause pressure differences. Higher altitudes are cooler than lower altitudes due to differences in compressional heating. Weather forecasting is the application of science and technology to predict the state of the atmosphere for a future time and a given location. The atmosphere is a chaotic system, so small changes to one part of the system can grow to have large effects on the system as a whole. Human attempts to control the weather have occurred throughout human history, and there is evidence that human activity such as agriculture and industry has inadvertently modified weather patterns.

Studying how the weather works on other planets has been helpful in understanding how weather works on Earth. A famous landmark in the Solar System, Jupiter's Great Red Spot, is an anticyclonic storm known to have existed for at least 300 years. However, weather is not limited to planetary bodies. A star's corona is constantly being lost to space, creating what is essentially a very thin atmosphere throughout the Solar System. The movement of mass ejected from the Sun is known as the solar wind.

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