"When we looked at them in detail and brought them to the lab, I could see some of the stems actually had new growth of green lateral branches, and that said to me that these guys are regenerating in the field, and that blew my mind, " she told BBC News.
When we invested in them we looked at it differently than others.
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"Sure, it could be live fish and it also could be these other things, because we tested them and looked at the evidence, " Baerwaldt said.
We synthesized these whistles and then we looked at whether dolphins react to them in the same way as they do to the whistles when you play the original.
When we first started looking for plants, we looked at over 700 in some detail, and we listed them.
Last week we looked at several asset categories and placed them on the risk-return chart.
In the interest of keeping things in perspective, we looked at the 10 nominees and sorted them by return on investment.
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To find them, we looked at the regular season OPS and the salary of each starting active roster player on each playoff team, excluding pitchers.
We looked at some emerging markets and decided to hold off on them.
We then looked at other data points: how many people work for them?
Using data and advice from William Shoemaker at the American Hospital Directory, we looked at several thousand hospitals with 200 beds or more and ranked them by operating margin.
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