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How We Know Extinct Dinosaurs Existed To learn about dinosaurs, researchers have to study physical clues and put these clues into the context of current scientific knowledge. This can be a tricky process. There were no humans on Earth when dinosaurs lived, so there are no written records or...
During the time of the Greek philosophers, Aristotle proposed that the Earth existed eternally. Meanwhile, Roman poet Lucretius, intellectual heir to the Greek atomists, believed that the formation of our planet must have been relatively recent. For a long time in the Western world, ancient peo...
Humans have been asking this question for thousands of years, and recently, it’s becoming clearer and clearer to scientists that the differences between people’s rates of aging lie in the complex interactions among genes, social relationships, environments and lifestyles. Even though you were born...
Before space exploration, humans didn't know that the solar system existed.Humans then thought that the Earth was at the center of the universe. B. The Sun: Essential for Life on Earth Life as we know it would not be possible without the heat and light of the sun.Through the process ...
If you live in a region where winter weather is a regular risk, you are likely used to pouring salt on your sidewalks. But how does it work? And how much salt do humans pour onto our planet’s surface? T...
Mars is a planet of great interest in the search for signatures of past or present life beyond Earth. The years of research, and more advanced instrumentation, have yielded a lot of evidence which may be considered by the scientific community as proof of past or present habitability of Mars....
The Anthropocene would not have taken place without the emergence of Earth System science in the 1980s and 1990s and ecological thinking that emerged in the 1960s and 1970s (Hamilton 2016, p. 98). The long-ignored work of Vladimir V. Vernadsky (Hamilton 2016, p. 94) is present in the...
How long would it take humans to travel one light year? An airplane traveling 600 mph (965 km/h) would take 1 million years to travel a single light-year! If we could travel one light-year using a crewed spacecraft like the Apollo lunar module, the journey would take approximately 27,...
Because Mars has no magnetic field, humans would receive whopping doses of cosmic radiation — not a problem on Earth, where the planet's magnetic field works to block it out. A 1,000-day trip to Mars has the potential to result in a 40 percent chance of the astronaut developing cancer...