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Do female birds have period bleeding too?

When it comes to animal biology, one common curiosity is whether female birds have periods like humans . After all, menstruation is a natural part of the reproductive cycle in women. But do birds experience the same? The Short Answer: No, birds don’t have periods. In fact, very few animals menstruate . Only: Great apes (including humans), Elephant shrews, and Some species of bats actually undergo true menstruation, where the uterine lining is shed and expelled as blood. What About Other Animals? Some mammals may show slight bleeding during estrus (heat cycle) , but this is not menstruation . It’s simply related to hormonal changes in their reproductive cycle. And Birds? Birds have a completely different system. Female birds do not have a uterus like humans . Instead, they have an oviduct where eggs develop. Instead of shedding a uterine lining, birds form and lay eggs as part of their reproductive process. That means no menstrual cycle, no period bleed...

Ph.D. and mental health

Ph.D. students face significant mental health challenges By Elisabeth Pain Apr. 4, 2017 Approximately one-third of Ph.D. students are at risk of having or developing a common psychiatric disorder like depression, a recent study reports. Although these results come from a small sample—3659 students at universities in Flanders, Belgium, 90% of whom were studying the sciences and social sciences—they are nonetheless an important addition to the growing literature about the prevalence of mental health issues in academia . One key message for scientific trainees that are struggling with these types of challenges, write co-authors Katia Levecque and Frederik Anseel of Ghent University in an email to Science Careers, is that “you are not alone.” Beyond that, the authors encourage Ph.D. students to appreciate how important it is to take care of themselves. “Mental health problems can develop into serious ...

Is the 5-second rule for dropped food true or a myth?

s the 5-second rule for dropped food real or just a myth? Learn what science says about eating food off the floor, how bacteria transfer, and when it’s safe or unsafe. Introduction Almost everyone has heard of the 5-second rule (or sometimes a 2-second rule) for food that falls on the floor. The idea is simple: if you pick up the food quickly—within a few seconds—it’s still safe to eat. It’s a rule many of us have used to justify rescuing a cookie, a sandwich, or even a French fry that slipped from our hands. But is there any scientific truth to this idea, or is it just a comforting myth we tell ourselves to waste less food? The answer is a mix of yes and no . While food does pick up fewer germs when it spends less time on the floor, bacterial transfer can happen instantly , and the actual risk depends on several factors. What Is the 5-Second Rule? The 5-second rule is an informal belief that food dropped on the ground is safe to eat if it is picked up within 5 seconds (or even 2 se...

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