Atoms and the Miracle of Life
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How Earth’s Primordial Soup Came to Life
Just as species are thought to have evolved over time, the individual molecules that form the basis of life also likely developed in response to natural selection, scientists say. Life on Earth first bloomed around 3.7 billion years ago, when chemical compounds in a “primordial soup” somehow sparked into life, scientists suspect. But what turned…
Did Expelled Stars Reionize the Ancient Universe?
Hot stars booted out of their galactic homes may be responsible for creating the conditions that led to today’s universe
Leap Second Receives Last-Minute Reprieve
The leap second may live on for at least another three years. Once or twice a year, the leap second can be tacked on to synchronize atomic clocks — the world’s scientific timekeepers — with the Earth’s rotational cycle, which does not run quite like clockwork. Without the leap second, atomic clocks would diverge about…
Billions of Habitable Alien Planets Should Exist in Our Galaxy
There should be billions of habitable, rocky planets around the faint red stars of our Milky Way galaxy, a new study suggests. Though these alien planets are difficult to detect, and only a few have been discovered so far, they should be ubiquitous, scientists say. And some of them could be good candidates to host…
Scientists Discover Frozen Organic Material on Mercury
Messenger spacecraft finds substances similar to tar or coal in craters on planet nearest sun
When the First Stars Blinked On
As far back in time as astronomers have been able to see, the universe has had some trace of heavy elements, such as carbon and oxygen. These elements, originally churned from the explosion of massive stars, formed the building blocks for planetary bodies, and eventually for life on Earth. Now researchers have peered far back…