Love and a Regurgitated Gift

In the world of fruit flies, romance can take surprising forms. The species Drosophila subobscura has a peculiar courtship ritual: before mating, a male must win over the female by giving her a gift. But instead of flowers or chocolates, he offers her a tiny mouth-to-mouth meal of regurgitated food. Interestingly, their close cousin Drosophila melanogaster—the fruit fly most often used in laboratories—doesn’t do this at all.

So what makes one species a generous suitor while the other skips the gift exchange? Japanese researchers discovered that the difference comes down to a single gene, called FruitlessM (FruM), which helps wire male brains for courtship behavior. In D. subobscura, this gene switches on in a group of brain cells that regulate feeding. When FruM is missing, the cells don’t grow the connections they need, and the males fail to present their nuptial gift.

Even more intriguing, when scientists turned on FruM in the same brain cells of D. melanogaster, something remarkable happened: the cells sprouted new connections, and the males began regurgitating food more often—hinting at a hidden potential for gift-giving buried in their biology.

This research shows how a small genetic change can spark big differences in behavior between species. What looks like a simple act of food sharing is, in fact, the product of evolutionary history written deep in the wiring of the brain.

Previous thoughts on the same topic:
Climate Warning Signs Were There 130 Years Ago – If Only We Had Noticed
Preventing future fires in Hawaii is possible, but the question remains: Are animal activists and politicians prepared for the necessary measures?
Seeing sex developed novel cultures

Has President Trump Lost His Grip on Reality?

The further President Donald Trump's term has progressed, the more obvious it seems that he has lost his grip on reality. The latest sign of this was his demand that Europe should retroactively pay compensation to the USA for not being able to produce goods competitive on the European market (example).

It is clear that European countries will not agree to such extortion. Nor will they stop exporting goods to the U.S. if Americans wish to buy them.

In this respect, it will be particularly interesting to see how much Trump manages to reduce the sales of European products in the United States. One would assume that price increases of even tens of percentage points—caused by tariffs—would significantly reduce their sales. However, it is also true that, in a similar way, the sale of American products to Europe will become more difficult due to countertariffs.

Lately, I have begun to suspect that Trump does not genuinely understand this. And therefore, he does not realize he should stop before irreversible damage is done to European-American trade relations.

And that is why I believe he has lost his grip on reality.

Previous thoughts on the same topic:
Economic Decline Awaits Americans as Trump Imposes Tariffs
Donald Trump’s Reliability as an Ally Has Proven to Be Questionable
The Real Problem with American Cars: Poor Market Fit

Why Mothers Naturally Embrace the Challenges of Newborn Care

A recent study by Camila Servin-Barthet and colleagues demonstrated that the gray matter volume in the brains of biological mothers decreased rapidly during pregnancy and partially recovered after childbirth—though slowly and only partially. The researchers also found that among healthy mothers, higher well-being, lower perceived stress, and lower depression correlated with reduced hostility toward the newborn.

Furthermore, the mother’s overall well-being explained more than 50% of the relationship between gray matter volume recovery and maternal attachment during the postpartum period. This can be interpreted as an indication that neuroanatomical changes occurring after pregnancy influence mothers' mental well-being and, in turn, promote their attachment to their child.

Servin-Barthet’s study expanded humanity’s understanding of how the interaction between hormones, brain development, and behavior affects mothers in such a way that, upon their child’s birth, they generally experience the child as the most cherished part of their life and willingly embrace the great effort required to care for a newborn. At the same time, the study once again demonstrated how a scientific approach enhances our understanding of a vast range of phenomena.

Previous thoughts on the same topic:
Football-Associated Violence Is a Personality Problem
A Fair Game or Unfair Judgment?
Finnish women have enjoyed a privileged position since medieval times