Canada's wildfires last year emitted more carbon than the annual total of all but 3 countries
How climate change could be making Midwest summer's 'corn sweat' stickier
This Paralympian could be the first disabled person to go to space
Lonely dolphin may be behind series of attacks on swimmers
SpaceX delays Polaris Dawn astronaut launch until at least Aug. 30 due to bad weather
SpaceX delays launch of daring Polaris Dawn excursion into Earth’s radiation belts
Scientists find surprising clue about Venus' past in its atmosphere
NASA's Perseverance rover on Mars begins steep climb to rim of a crater
