Earth


Michael Reilly reports in the New Scientist: An asteroid 300 metres in diameter is stalking the Earth. Hiding in the pre-dawn twilight, it has marched in lockstep with our planet for years,…


Radio BroadcastsLook for the tiny blue dot for our impact. Adam Grossman writes about “The Tiny Humanity Bubble” on jackadamblog:

Mankind has been broadcasting radio waves into deep space for about a hundred years now — since the days of Marconi.

That, of course, means there is an ever-expanding bubble announcing Humanity’s presence to anyone listening in the Milky Way. This bubble is astronomically large (literally), and currently spans approximately 200 light years across.

But how big is this, really, compared to the size of the Galaxy in which we live (which is, itself, just one of countless billions of galaxies in the observable universe)?





SupercontinentAlasdair Wilkins on io9.com has a great post about the past and future of our planet’s continents. Definitely worth a read:

Earth’s continents are constantly changing, moving and rearranging themselves over millions of years — affecting Earth’s climate and biology. Every few hundred million years, the continents combine to create massive, world-spanning supercontinents.

Here’s the past and future of Earth’s supercontinets.




The Earth could lose more than one fifth of all known plants — forever! Story from the Guardian: One in five of the world’s plant species – the basis of all life…


Stacie Adams writes on Smirking Chimp: A week or two ago the internets were ablaze with the news that not only did famed physicist Stephen Hawking appear to believe in the existence…