The seeds and pollen, or the lack of them, can show severe weather changes over thousands of years.
VOA: special.2010.04.07
Any marginal changes in the weather,she says, can drive thousands of children into a situation of severe and acute malnutrition.
VOA: standard.2010.02.04
The problem is that just as price changes have to be severe to manifest any impacts on gas consumption, price changes on their own also tend not to do much to inspire the development of radical new tech solutions, unless prices are through the roof.
To get to your question, the antidepressant potential of ketamine was discovered serendipitously in patients receiving the drug for the treatment of complex regional pain syndrome, or CRPS, a miserable condition characterized by severe pain, swelling and changes in the skin.