Champ and Major are the new White House dogs, but there have been lots of pets at the president's house over the years, including Rebecca the raccoon, who definitely left her mark on the place during Calvin Coolidge's presidency.
Humans have been trying to figure out how to replicate plant photosynthesis for a long time - and we’ve had some successes, but a team at the University of Michigan has taken one of the biggest steps forward, with a process that uses metals as catalysts to turn light, carbon dioxide and water into methane.
