During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm repeatedly. Daily levels of CO2 can vary due to weather, and there are seasonal trends as well.
Airburst from Meteorite Injures Hundreds in Russia
About 9:20 am local time on February 15, 2013, the sounds of explosions in Chelyabinsk, Russia, announced the arrival of a meteorite in the skies above the city (1500 km east of Moscow). The meteorite exploded, generating fragments that peppered the city, injuring over 500 people mainly from broken glass. For more on the story, see http://www.reuters.com/article/2013/02/15/us-russia-meteorite-idUSBRE91E05Z20130215. Meteors are referred to as meteorites when they hit the ground, which they clearly did in this case!
