Oct 13, 2025, 2:00 AM ETInterview, Fireside Chat

Neil deGrasse Tyson: The Harsh Truth About Horoscopes (sorry but it’s true)

Roughly 80% of Gen Z believe in astrology, with 72% allowing it to influence major life decisions regarding romance, health, work, and education.
If 100% of a population relied on such non-scientific frameworks, civilization would regress to a pre-scientific state where natural phenomena are attributed to forces beyond understanding.
Humanity shares 20% of identical genes with bananas, demonstrating a biological commonality that transcends superficial racial or religious divisions.
Air molecules inhaled by historical figures like Jesus or Muhammad are currently being inhaled by people in China due to atmospheric mixing.
Humans share a more recent common ancestor with fungi (mushrooms) than with green plants.

The elemental composition of the human body (Hydrogen, Oxygen, Carbon, Nitrogen) matches the sequence of elements in the universe exactly, proving humans are literally composed of stardust.
Astrophysical evidence confirms that heavy elements necessary for life were forged in stellar cores and scattered by supernovae.
From a cosmic vantage point, Earth's atmosphere is proportionally as thin as an apple's skin to the fruit, highlighting the fragility of the ecosystem.
Neil deGrasse Tyson argues that "tribalism" based on skin color, religion, or language is a human construct that ignores the objective scientific reality of our shared biological and cosmic origins.
The "cosmic perspective" serves as an antidote to nihilism, replacing feelings of insignificance with a sense of being a participant in a great, unfolding story of cosmic evolution.

Tyson views mortality as a necessary condition for meaning; living forever would mathematically render life meaningless due to the inability to focus an infinite amount of time.
His desired epitaph is the Horace Mann quote: "Be ashamed to die until you have won some victory for humanity."
Personal grief, such as the loss of his parents, shifts focus from tragedy to the celebration of a full life lived, prompting a transfer of wisdom to the next generation.
Tyson rejects the idea of searching for pre-existing meaning, asserting instead that individuals must actively create meaning through learning, action, and the transformation of information into wisdom.
The "escape velocity" of aging describes a future threshold where medical advancements allow a person to live longer each year, theoretically extending life indefinitely, which Tyson rejects as a stagnation of civilization.

Tyson notes that devout believers in one religion are typically atheists toward all other religions, suggesting that religious adherence is often tribal rather than evidentiary.
He defines the "God of the Gaps" as the theological error of defining God only as the current limit of scientific explanation, which results in God shrinking as science advances.
Religion historically provided necessary social cohesion and community; the modern decline in religious attendance correlates with increased loneliness and the loss of these binding social structures.
Tyson systematically studied various religious texts (Torah, Quran, etc.) not to convert, but to facilitate more informed, meaningful conversations with believers without imposing his own views.
He distinguishes between objective truth and subjective belief, warning that a society built on "what people think is true" rather than "what is true" leads to the unraveling of civilization.

Tyson asserts the probability of humans traveling to another planet in his lifetime is zero, arguing that spaceflight is driven by geopolitical necessity (e.g., the Cold War space race) rather than pure curiosity.
Project Artemis is motivated by China's lunar ambitions, not an inherent desire to return to the moon.
The cost of a one-way trip to Mars is estimated at $1 trillion, with a round trip taking 3–5 years, making it economically unviable even for billionaires without state funding.
Regarding the simulation hypothesis, Tyson calculates that if simulated universes are possible, there are likely billions of them; however, he finds comfort in the probability that we are either the first real universe or the last one to not yet have created a simulation.
He rejects the Matrix-style premise of humans as energy sources due to the Second Law of Thermodynamics, which dictates energy loss in conversion processes makes such a system inefficient.
Tyson expresses concern that AI will force true human creativity to evolve beyond aping past styles, as AI can perfectly replicate existing art but cannot yet generate novel, uncharted concepts.
He warns that if Superintelligence arrives and humans are irrelevant, we may become "pets," a state that is not necessarily better than the treatment of chickens.

Tyson dismisses UFO sightings as "unidentified" but not "extraterrestrial," noting that amateur astronomers, who possess better observational skills, see fewer anomalies than the general public.
He argues that the existence of intelligent life elsewhere is statistically probable given the age of the universe (14 billion years) and the prevalence of life-creating ingredients, though we have found no evidence of contact.
The "SETI" search has been limited to a tiny fraction of the galaxy and a narrow window of time (80 years of radio technology), making the lack of detection unsurprising.
He critiques the rise of astrology among youth as a rejection of scientific literacy, fearing it prevents the development of engineers and scientists who rely on objective truth.
Tyson advises that "learning to love the questions" is more valuable than seeking definitive answers, as the expansion of knowledge inevitably increases the perimeter of our ignorance.

Tyson rejects providing advice to younger generations, arguing that wisdom is only earned through personal experience, mistakes, and reflection, not through pre-emptive warnings.
He admits to one significant regret: writing a harsh, unencouraging evaluation of a high school student during his college years that potentially stifled that student's future path.
His core advice is to never overvalue one's own thoughts, to remain humble daily by challenging one's current beliefs, and to recognize that one is always a "work in progress."
He argues that the electorate, not politicians, is responsible for political leadership, as elected officials are a reflection of the values and knowledge of the voters.
Tyson emphasizes that basic science is the foundation of all engineering and economic prosperity, citing quantum physics (discovered 100 years ago) as the bedrock of the modern information age.