In The Joy of X: A Guided Tour of Math, from One to Infinity, mathematician Steven Strogatz provides an entertaining refresher course in math, starting with the most elementary ideas, such as counting, and finishing with mind-bending theories of infinity--including the idea that some infinities can be bigger than others.
Giuseppe Arcimboldo was a 16th-century artist who liked to play with his food, transforming it into the building blocks of many of his fantastical portraits. Artist Philip Haas has taken those portraits out of museums, reinterpreting them as colossal statues that interact with the natural environment.
Whether it's President Richard Nixon's resignation or President Bill Clinton's impeachment, presidents tend to have a tough time during the back half of an eight-year presidency.
Yahoo will pay about $1.1 billion for the six-year-old blogging site. Tumblr's leadership won't change and Yahoo promises it will be independently operated.