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Eggs without yolk can hatch too

Most animals reproduce by laying eggs. As the embryo develops, its feeds on the egg yolk. No egg yolk, no offspring, then? Not always. Biologists from KU Leuven, Belgium, have discovered an exception to the rule: the eggs ...

dateNov 12, 2015 in Plants & Animals
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Are male brains wired to ignore food for sex?

Choosing between two good things can be tough. When animals must decide between feeding and mating, it can get even trickier. In a discovery that might ring true even for some humans, researchers have shown that male brains ...

dateOct 16, 2014 in Plants & Animals
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Killer whales feast on salmon in summer

Salmon are the primary summer food source for an endangered population of killer whales in the Pacific Northwest, according to an analysis of fish DNA in killer whale poop published Jan. 6, 2016 in the open-access journal ...

dateJan 06, 2016 in Ecology
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