waiting with bated ……

Don’t panic, but researchers have discovered that oxygen is (very) slowly draining out of Earth’s atmosphere, and right now, they’re not sure why.

By analysing air bubbles trapped inside ice cores from Greenland and Antarctica, a team from Princeton University has found oxygen levels have dropped by 0.7 percent in the last 800,000 years, and figuring out why could be crucial to predicting our planet’s future.

As far as ecosystems on Earth are concerned, the drop is only a trivial one, but it can still tell us more about the secrets of what makes a planet habitable – useful information to have if we’re ever going to live on Mars

….Another possible cause is long-term climate change – over the last few million years, we’ve seen a slight overall drop in global temperatures, even though Earth has been rapidly heating up over the past half a century.

Science Alert, 23 Sep 2016

thanks to ddh