A huge piece of space junk is about to make an uncontrolled re-entry back into Earth’s atmosphere, threatening to drop debris on a number of cities around the world in the coming days. It’s leftover from China’s first module for its new Tianhe space station — and no one knows where it will land.
City sidewalks and brick buildings look a little greener today, thanks to new research showing that cement can soak up CO2. That’s not the only good news to come out this week. A team of German scientists engineered photosynthesis to be faster and more efficient. And a team of Americans buried 1,000 tons of carbon pollution underground.
In the centuries to come, history books will likely look back on September 2016 as a major milestone for the world’s climate. At a time when atmospheric carbon dioxide is usually at its minimum, the monthly value failed to drop below 400 parts per million.
We’re officially living in a new world.
Carbon dioxide has been steadily rising since the start of the Industrial Revolution, setting a new high year after year. There’s a notable new entry to the record books. The last station on Earth without a 400 parts per million (ppm) reading has reached it.
Don’t worry, there is nothing unnatural about that strange arcs of light you’ll sometimes see in the sky. Ice halos are a very natural atmospheric phenomenon, created when ice crystals suspended in the sky reflect and refract sunlight. But they truly are an impressive sight.