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23 mag 2024 · The Snowball Earth is a geohistorical hypothesis that proposes during one or more of Earth's icehouse climates, the planet's surface became entirely or nearly entirely frozen with no liquid oceanic or surface water exposed to the atmosphere. The most academically referred period of such global glaciation is believed to have occurred sometime ...
2 giorni fa · By 2000, there were approximately ten times as many people on Earth as there had been in 1700. However, this rapid growth did not last. During the period 2000–2005, the United Nations estimates that the world's population was growing at an annual rate of 1.3% (equivalent to around 80 million people), down from a peak of 2.1% during the period 1965–1970. [5]
3 giorni fa · 5.0–5.9. 569. 4.0–4.9. 4,860. ← 2023. This is a list of earthquakes in 2024. Only earthquakes of magnitude 6 or above are included, unless they result in significant damage and/or casualties. All dates are listed according to UTC time. The maximum intensities are based on the Modified Mercalli intensity scale.
3 giorni fa · It is one of several greenhouse gases in the atmosphere of Earth. The current global average concentration of carbon dioxide (CO 2) in the atmosphere is 421 ppm as of May 2022 (0.04%). [1] This is an increase of 50% since the start of the Industrial Revolution, up from 280 ppm during the 10,000 years prior to the mid-18th century.
1 giorno fa · The first documented use of the phrase "United States of America" is a letter from January 2, 1776. Stephen Moylan, a Continental Army aide to General George Washington, wrote to Joseph Reed, Washington's aide-de-camp, seeking to go "with full and ample powers from the United States of America to Spain" to seek assistance in the Revolutionary War effort.
22 mag 2024 · The alkaline earth metals are six chemical elements in group 2 of the periodic table. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). [1] The elements have very similar properties: they are all shiny, silvery-white, somewhat reactive metals at standard temperature and pressure.
4 giorni fa · Almost all mountains in the list are located in the Himalaya and Karakoram ranges to the south and west of the Tibetan plateau. All peaks 7,000 m (23,000 ft) or higher are located in East, Central or South Asia in a rectangle edged by Noshaq (7,492 m or 24,580 ft) on the Afghanistan–Pakistan border in the west, Jengish Chokusu (Tuōmù'ěr Fēng, 7,439 m or 24,406 ft) on the Kyrgyzstan ...
