Search results
Results from the WOW.Com Content Network
In Larry Niven's 1980 short story "The Green Marauder", [6] an alien over 700 million years old (due to relativistic travel) tells a human about the last time it visited Earth, and the hopeless plea from Earth's anaerobic civilization for help against the growing environmental threat of chlorophyll.
Human presence in outer space began with the first launches of artificial object in the mid 20th century, and has increased to the point where Earth is orbited by a vast number of artificial objects and the far reaches of the Solar System have been visited and explored by a range of space probes.
[109] [110] [99] [104] [100] Joon Yun considers space colonization as a solution to human survival and global problems like pollution to be imperialist; [111] others have identified space as a new sacrifice zone of colonialism. [112] Furthermore the understanding of space as empty and separate is considered a continuation of terra nullius. [5 ...
An artist's conception shows a terraformed Mars in four stages of development.. Terraforming or terraformation ("Earth-shaping") is the hypothetical process of deliberately modifying the atmosphere, temperature, surface topography or ecology of a planet, moon, or other body to be similar to the environment of Earth to make it habitable for humans to live on.
The U.S. space agency's Artemis program aims to put astronauts in the coming years on the lunar surface for the first time since 1972 in preparation for potential future human missions to Mars.
The dominant cause of the warming since the 1950s is human activities. This scientific finding is based on a large and persuasive body of research. The observed warming will be irreversible for many years into the future, and even larger temperature increases will occur as greenhouse gases continue to accumulate in the atmosphere.
Guy Stewart Callendar (/ ˈ k æ l ə n d ər /; 9 February 1898 – 3 October 1964) was an English steam engineer and inventor. [1] His main contribution to human knowledge was developing the theory that linked rising carbon dioxide concentrations in the atmosphere to global temperature.
Scientific consensus on causation: Academic studies of scientific agreement on human-caused global warming among climate experts (2010–2015) reflect that the level of consensus correlates with expertise in climate science. [435] A 2019 study found scientific consensus to be at 100%, [436] and a 2021 study concluded that consensus exceeded 99% ...