Though America has come a long way since that day on the Washington Mall, the hardest tasks of integration remain to be tackled.
Critcism of Obama's speech to Morehouse graduates may be overlooking the fact that black Americans need to speak more themselves and rely less on celebrities to define us.
Like space itself, property rights for celestial bodies are an unknown frontier. Just who owns all these asteroids that are the targets of space miners?
Food companies have purposely engineered junk foods to be addictive. How does the addiction work, what are the consequences, and what can we do about it?