With calves weaned, veterinarians criss-cross the country conducting pregnancy checks, or preg checking, cow herds. The vet ...
Like all organisms, we are bundles of adaptations that each have local jobs. But all of these jobs have been subservient, under selection, to the goal of reproduction. In other words, ultimately, we ...
The energy invested in animal reproduction is as much as 10 times greater than previously estimated when the metabolic load of bearing and caring for offspring is accounted for, according to a new ...
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