7 Things You Need To Know Today (June 14)

In another experiment in the quantified self, this tattoo ink could be a game changer for biohackers, diabetics, people with heart problems, and many others. The ink, called the Dermal Abyss, changes from blue to brown as blood sugar rises and also monitors things like salt saturation and pH of the body. The only bad news? Right now it's still at the proof-of-concept stage, simply a hint of what's to come. (Science Alert)

The first study on the geographical landscape of invasive species found that Hawaii is a hotspot. In other words, non-native birds, fish, reptiles, etc., brought to the islands by humankind are throwing off the ecosystem. (Popular Science)

In a new study of 195 countries, researchers found that more than 2 billion adults suffered from health problems stemming from obesity, and more people than ever are dying from obesity-related conditions. For some perspective, that's 30 percent of the world's population. Yep, it looks like we have some serious work to do. (Science Of Us)

If all the cells in your immune system are different instruments, your dendritic cells would be the conductor leading the symphony. Each allergen is a new cue to the dendritic cells, leading the immune system to play a different tune for each and sparking the chain reaction that leads to mucus, eye watering, and wheezing that plagues many of us all spring. Now you know. (Scientific American)

And that's great for men, who benefit like all of us from close friendships. Unlike other models of male kinship, which encourage bravado and exaggerations of sexual prowess, bromances are characterized by the revelation of real emotions and an honest dialogue about fears and hopes—the real stuff of relationships. They may even include nonsexual cuddles. Three cheers for the new masculinity! (Quartz)

The liver is a vital but oft underappreciated organ that's entirely unique in the human body. It's the one organ that can regenerate, even if halved or quartered in size, and it performs over 300 functions (second only to the brain!) in the body, including making the food we eat useful for our cells, neutralizing and eliminating the harmful substances we ingest, aand generating hormones, enzymes, and much, much more. Love you, liver. (NYTimes)

For over 50 years, it's been widely disseminated that psychopaths are "emotionless," and that's why they act in ways that are unhealthy for both themselves and for others. But new research, which examined the reaction of diagnosed psychopaths after experiencing a disappointing outcome and the impact of that outcome on future decisions, makes a strong case for the theory that psychopaths can and do experience regret and remorse. They are simply unable to learn from it. (PsyPost)