We suggest that as the Earth changed physically and chemically over time, its surface conditions allowed for a greater diversity of habitats for life. And these changes operate on geologic timescales ...

Both are species of cowardice.” The right cared nothing for either Jennifer or Melissa, or for their mothers. Their pain only ...

What’s your purpose in life? It’s a daunting question. But your answer may say a lot about your well-being. Studies link a sense of purpose to better physical and mental health. But your purpose isn’t ...