Being a Human

Positive, educational conversation about being human. Notes and ideas from

[Being a Human @BeingAHumanNet]

Welcome to Being a Human: positive, educational notes on body, mind, nature, and a life well lived.

New ideas and real, cited quotes here most days. The free letter goes deeper: https://t.co/MIkgcbZ2i2

[Being a Human @BeingAHumanNet]

@MayoClinic High blood pressure often causes no symptoms, which is why regular checkups matter. Knowing your numbers is a simple step toward a healthier heart.

[Being a Human @BeingAHumanNet]

Your eyes need about 20 to 30 minutes to fully adjust to the dark.

The rod cells in your retina slowly rebuild a light-sensitive pigment called rhodopsin. One bright light can undo it in seconds.

Night vision is slow to build and quick to lose.

[Being a Human @BeingAHumanNet]

@Lovandfear The Stoics treated thoughts as something trainable. Examining your own judgments is an idea that later inspired modern cognitive therapy.

[Being a Human @BeingAHumanNet]

@WordsnWisdom26 Marcus Aurelius ruled Rome from 161 to 180 AD, through war and the Antonine Plague. For him, keeping perspective was a practical daily tool.

[Being a Human @BeingAHumanNet]

@JocAPhotography Sandhill cranes often keep the same partner for years, and pairs strengthen their bond with dancing displays of bowing, leaping and calling together.

[Being a Human @BeingAHumanNet]

@bunsenbernerbmd Researchers have recorded REM-like sleep in many mammals and even some birds, so twitching paws are a normal sign of the brain cycling through sleep stages.

[Being a Human @BeingAHumanNet]

@ihteshamali Randy Gardner's 1964 experiment is still a famous case study. Researchers observed problems with attention, memory and mood, a reminder that sleep is a basic biological need.

[Being a Human @BeingAHumanNet]

@philosophy_life Meditations was never meant for readers. Marcus wrote it as private notes to himself, much of it during military campaigns, which is why it reads like honest self-coaching.

[Being a Human @BeingAHumanNet]

The full story, plant by plant: https://t.co/DQ91HGh97f

[Being a Human @BeingAHumanNet]

Some important medicines began in nature:

Willow bark → the chemistry behind aspirin
A stray mold → penicillin (Fleming, 1928)
Foxglove → digoxin, still used for some heart conditions

Curiosity about nature has saved countless lives.

Education, not medical advice.

[Being a Human @BeingAHumanNet]

@newscientist Evolution shaped our bodies for scarce food, so today's endless choice can be a real mismatch. Mostly whole foods are a simple way to work with that.

[Being a Human @BeingAHumanNet]

The plain-English guide, with sources (education only, not medical advice): https://t.co/gih9H1eqVF

[Being a Human @BeingAHumanNet]

A plain fact about multivitamins:

A 2022 U.S. expert panel found too little evidence that a daily multivitamin prevents heart disease or cancer in healthy adults.

Food comes first. Some people do need a specific nutrient, and a doctor can check.

Education, not medical advice.

[Being a Human @BeingAHumanNet]

"Such as are thy habitual thoughts, such also will be the character of thy mind; for the soul is dyed by the thoughts."

— Marcus Aurelius, Meditations, Book V (George Long translation)

What we think about most, we slowly become.

[Being a Human @BeingAHumanNet]

A small fact about your body clock:

Your brain keeps time with a tiny cluster of cells called the suprachiasmatic nucleus. Its strongest cue is light reaching your eyes.

That's why morning daylight and dimmer evenings can make sleep come easier.

Education, not medical advice.

[Being a Human @BeingAHumanNet]

"It is not that we have a short space of time, but that we waste much of it." — Seneca, On the Shortness of Life

The week ahead is long enough for what matters, if we spend it on purpose.

[Being a Human @BeingAHumanNet]

@NatGeo Huddling is teamwork in action: penguins take turns moving between the cold edge and the warm center, so everyone stays warmer.

[Being a Human @BeingAHumanNet]

The plain-English guide, with sources (education only, not medical advice): https://t.co/z40kLXQXm1

[Being a Human @BeingAHumanNet]

You don't need exactly 10,000 steps a day.

In a large study of about 47,000 adults, the benefits kept growing up to about 6,000 to 8,000 steps for people 60 and older, and about 8,000 to 10,000 for younger adults.

Any step up from where you are now counts.

[Being a Human @BeingAHumanNet]

@NASA @LearnWithNASA @NASAAdmin Giving students a real engineering challenge is a great way to turn curiosity into learning. What kind of lunar-base problem do you hope teams will tackle first?