Images of two-lobed hearts are all over everything this month: candy, cards, decorations, etc. But why does the ubiquitous heart symbol not look anything like an actual human heart?

BIG QUESTIONS
If you attend a Super Bowl party on Sunday, you’ll probably hear at least one casual football viewer ask, “How do they get that yellow first-down line on the field?”
We often hear about the plights of the Third World, and most of us have our share of First World problems. But is there something in between—a Second World?
Those tiny candies pack a lot of pressure.
It cannot be reasoned with. It cannot be bargained with. It's coming for you.
The earthquake-triggered waves are both destructive and unpredictable.
Both the House and the Senate have their own Sergeant at Arms, and their visibility is highest during the State of the Union address. But what do they do the other 364 days of the year?
It's surprisingly easy—though it sometimes necessitates an ice pick.