April 6, 2013
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Our recent winter weather has kept me thinking about ice, snow and water lately. We spend every day surrounded by water in many different forms, rarely considering its critical role in our lives both past and present.
Comet ISON, first spotted by Russian astronomers in September 2012, broke up while passing too near the sun this Thanksgiving. After billions of years of traveling through space, it now consists of little more than scattered dust and rocky debris.
One way of viewing modern biology is to make a list of unifying ideas that tie such a huge field of science together. The shortest list would consist of evolution alone, for as a biologist named Theodosius Dobzhansky once said, “Nothing in biology makes sense except in the light of evolution.”
The oceans cover over two-thirds of our planet’s surface, making it hard to imagine we humans could do them much damage.
When our hot summer temperatures arrive, I think back to time spent in the Midwest. Sun or shade, breeze or not, high temperatures just felt more uncomfortable there than here in the gorge.
Science sometimes advances by giant leaps, but more often moves in small steps by gradually gathering new evidence. The calculated age of the Earth is a good example, having shifted from a few thousand to 4.5 billion years old over the last two centuries.
It’s been nearly six months since my last rant about climate change, arguably one of the biggest science stories of our time. In early May we reached the milestone level of 400 parts per million carbon dioxide (CO2) in the atmosphere, a good excuse to revisit the latest signs of global warming.
All life on Earth shares a common ancestor. You just have to trace the evolutionary tree over 3 billion years into the past to find it. And while family resemblances get harder to see the further back you go, modern science unmistakably ties us all together.
The discovery of hydrothermal deep sea vents in the late 1970s opened up multiple new areas of research and learning for geologists, chemists and biologists.