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Carrier and coworkers speculate that male sperm whales use their heads to batter rivals while competing for females—behavior, they point out, common to humpback whales and bottlenose whales.

Hargrove: Daniel He’s a whistle-blower who carried an actual whistle, which he wore around his neck during his 12 years as a trainer of killer whales at SeaWorld theme parks. The whistle ...

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GOBankingRates was able to find each state’s middle-class income range by sourcing the median household income, total population and households. The middle-class income was then calculated using ...