Five hidden Excel rules show helper columns, LET, and LAMBDA in action, cutting errors and making updates quick for any growing sheet.

Like part of a cosmic Russian doll, our universe may be nested inside a black hole that is itself part of a larger universe. In turn, all the black holes found so far in our universe—from the ...

Sean Ross is a strategic adviser at 1031x.com, Investopedia contributor, and the founder and manager of Free Lances Ltd. Gordon Scott has been an active investor and technical analyst or 20+ years. He ...

David Kindness is a Certified Public Accountant (CPA) and an expert in the fields of financial accounting, corporate and individual tax planning and preparation, and investing and retirement planning.

Consider the susceptibility of organic molecules to reactions with ambient species, such as atmospheric oxygen or moisture. The same basic property that makes organic molecules synthetically 'flexible ...

The Space Odyssey series is a science fiction series of two film adaptations from Arthur C. Clarke works. 2001: A Space Odyssey — a film and novel — produced concurrently and released in 1968, and ...