Tag Archives: Natural Selection

A 1910 photograph of the physicist William Thomson, also known as Lord Kelvin, conducting compass measurements.
1862: Tracing Earth’s Timeline – The Scientific Journey to Determine Its Age

William Thomson, Lord Kelvin, initially estimated Earth's age at 20 to 40 million years, a figure debated by nineteenth-century scientists. The discovery of radioactivity led to a revised estimate of 4.567 billion years, aligning with [...]

Top: A photograph of Charles Darwin from around 1870. Bottom: An 1845 drawing by the ornithologist John Gould illustrating the variety of finch beaks encountered by Darwin during his travels through the Galápagos Islands in 1835.
1858-1859: Unveiling the Secrets of Evolution – The Theory of Natural Selection

Charles Darwin and Alfred Russel Wallace independently formulated the theory of natural selection, explaining how traits contribute to survival and reproduction, shaping species over time. Darwin's "On the Origin of Species" popularized this theory, now [...]

This image shows male sperm and a female egg, illustrating the concept of sexual reproduction where genetic information from two parents is combined to create unique offspring. This evolutionary innovation was first introduced by early eukaryotic organisms around 1.2 billion years ago and has proven to be a highly effective evolutionary strategy.
c. 1.2 Billion BCE: The Evolutionary Leap – The Origin of Sex in Eukaryotes

Explores the transition of eukaryotes from asexual to sexual reproduction around 1.2 billion years ago, highlighting the evolutionary advantages of sexual reproduction in enhancing genetic diversity and adaptation.