This is Katie Hunt, filling in for Ashley Strickland, on this week’s CNN Science Bulletin.
It’s easy to think of the night sky as a constant source of wonder that has changed little since the dawn of mankind.
But our view of the cosmos is changing due to the proliferation of satellites, like those launched by Elon Musk’s SpaceX. In less than a decade, 1 out of every 15 points of light in the night sky will actually be a moving satellite, a big problem when Consider that you can only see about 4,000 stars with the naked eye.
This satellite contamination could hamper our ability to detect, and possibly deflect, asteroids.
If you’ve ever served a beer in a clear glass and left it out in the sun, it can taste unpleasant. This is because when the hops in beer are exposed to strong light, a photo-oxidation reaction takes place that creates the compound 3-methyl-2-butene-1-thiol. This is a chemical compound similar to the stinky odor produced by skunks.
Dark tinted glass can help prevent this process, which has been dubbed “skunk” by brewers.
While the British discovered some similar ancient jug sites in the 1920s, an excavation that took place in 2020 uncovered four previously unknown sites.
Similar jars have been found in the Southeast Asian country of Laos, and researchers have been lucky enough to find jars that were still intact, with artifacts like beads and human remains inside.
However, these more recent discoveries they were empty, so it is difficult to know from which culture and when they originated. The researchers hope to find some unopened jars that shed light on its mysterious origins.
Indigenous communities around the world have used fires for thousands of years to clear the land of additional debris.
Fighting fire with fire may sound counterintuitive, but the practice removes dry vegetation that can easily catch fire and creates intense flames that are more difficult to fight. It also makes forests more resilient, making future wildfires less likely.
Long time ago
I love cats, but I’m not immune to a pair of soulful puppy dog eyes. Neither, it seems, were our Stone Age ancestors.
It turns out that humans selectively bred dogs to have such compelling eyes, and started about 33,000 years ago.
once upon a planet
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