"Natural gas, long seen as a cleaner alternative to coal and an important tool in the fight to slow global warming, can be just as harmful to the climate, a new study has concluded, unless companies can all but eliminate the leaks that plague its use."

"An expansive heatwave that's been baking the southern United States for nearly two weeks is only expected to intensify as the weekend approaches, forecasters say. Heat advisories and warnings are still in place from Florida to Arizona, impacting more than 111 million people, according to a count from the Associated Press."

"In cities around the world, anti-bird spikes are used to protect statues and balconies from unwanted birds - but now, it appears the birds are getting their own back. Dutch researchers have found that some birds use the spikes as weapons around their nests - using them to keep pests away in the same way that humans do."