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How the universe made us

How the universe made us

Once upon a time, most of the worldly elements came from stars.

10 minute read Kaustav Das
The science of fear and decision-making

The science of fear and decision-making

What one of our most common fears — arachnophobia — can teach us about human decisions.

13 minute read Sharon Chen
Caltech Letters Year in Review: Our 5 Favorite Articles of 2021-22

Caltech Letters Year in Review: Our 5 Favorite Articles of 2021-22

With campus commotion returning to pre-pandemic levels, we’ve continued to grow and expand our site. Here's a look back at 2021-22.

6 minute read Skyler Ware
Feeling wine: The science behind our perception of tannins

Feeling wine: The science behind our perception of tannins

How chemistry and our sense of touch contribute to the way we experience food and drink.

14 minute read Siobhán MacArdle
A Sneak Peek at the Quantum Revolution

A Sneak Peek at the Quantum Revolution

Quantum physics is weird, but this very weirdness could propel a technological revolution if we learn to control it.

16 minute read Piero Chiappina
Caltech Letters Year in Review: Our 5 Favorite Articles of 2020-2021

Caltech Letters Year in Review: Our 5 Favorite Articles of 2020-2021

With the pandemic slowing and the campus sputtering back to life, we take a look back at our favorite reads from last year.

6 minute read Phelan Yu
Pills and Mathematical Paradigms: Tracking Opioid Abuse in the US

Pills and Mathematical Paradigms: Tracking Opioid Abuse in the US

Are policies curbing drug use as effective as they seem? Mathematical modeling can help us answer that question.

15 minute read Shiyu Zhang
The Big One

The Big One

When we live in earthquake country, science helps us prepare for the next Big One, and our community ties help us recover

10 minute read Ollie Stephenson
Larger than Life: How a New Conceptualization of “Lyfe” Can Widen Scientific Understanding

Larger than Life: How a New Conceptualization of “Lyfe” Can Widen Scientific Understanding

What does it mean to be alive and how can scientists differentiate living from nonliving things? The concept of "Lyfe" may provide an answer.

17 minute read Mike Wong
Decoding the Language of Genomes

Decoding the Language of Genomes

In the shadow of LA's San Gabriel mountains, scientists are learning the language of life

14 minute read Nicholas McCarty et al.
Caltech Letters Year in Review: Our 5 Favorite Articles of 2019-2020

Caltech Letters Year in Review: Our 5 Favorite Articles of 2019-2020

In a year like no other, Caltech Letters continued to give voice to our community

7 minute read Alison Koontz
Trust Your Gut: The Body's Second Brain

Trust Your Gut: The Body's Second Brain

The microbial connection between your digestive tract and your brain may explain how diet affects mental health

14 minute read Reem Abdel-haq
The Problems with Programming Biology: Bacteria vs. Engineering

The Problems with Programming Biology: Bacteria vs. Engineering

Synthetic biologists can now engineer bacteria to perform a variety of tasks, but bacteria do not always wish to be engineered

13 minute read Samuel Clamons
Life in the Abyss: Exploring the Deep Recesses of our Oceans

Life in the Abyss: Exploring the Deep Recesses of our Oceans

Deep down in the ocean, Caltech scientists explore the rhythm of life at a methane seep

14 minute read Sean Mullin
How Earthquakes Shape our Landscape

How Earthquakes Shape our Landscape

From Tehran to Los Angeles, earthquakes control the landscape, and the landscape controls where we live. This means learning to live with earthquakes

15 minute read Camilla Penney
Automating the Art of Making Molecules

Automating the Art of Making Molecules

Smart robots & AI technologies are transforming how chemists make molecules

12 minute read Jonathan Chan
Building Machines in our Image

Building Machines in our Image

As we design smarter and smarter machines, are we paying too much attention to ourselves?

9 minute read Joe Marino
How Synthetic Biologists Could Save the Cavendish Banana from the Brink of Collapse

How Synthetic Biologists Could Save the Cavendish Banana from the Brink of Collapse

Genetically modified organisms have a bad rap these days, but this story of synthetic biology saving a species provides a different perspective

11 minute read Nicholas McCarty
A Stellar Hello from Andromeda

A Stellar Hello from Andromeda

Studying galaxies far away can tell us a surprising amount about the galaxy we call home

14 minute read Ivanna Escala
How the Ridgecrest Earthquakes Broke the Earth

How the Ridgecrest Earthquakes Broke the Earth

The recent Earthquakes in California sent scientists racing to understand how they happened and what they mean

17 minute read Ollie Stephenson
The Cow: A Mysterious Cosmic Explosion Disrupts the Night Sky

The Cow: A Mysterious Cosmic Explosion Disrupts the Night Sky

Scientists rush to determine the origins of a strange cosmic explosion

12 minute read Anna Ho
Caltech Letters Year in Review: Our 5 Favorite Articles of 2018-2019

Caltech Letters Year in Review: Our 5 Favorite Articles of 2018-2019

We’re celebrating our first full academic year of sharing amazing science! These are our 5 favorite articles of the past year

7 minute read Alison Koontz
A New Window Into the Universe

A New Window Into the Universe

The first detection of gravitational waves, and how they provide a look at cosmic cataclysms of the distant past

17 minute read Maximiliano Isi
Listening to the Heartbeat of our Planet

Listening to the Heartbeat of our Planet

How seismology at the turn of the 19th century transformed our knowledge of the Earth

14 minute read Jack Muir
Growing Galaxies on your Laptop

Growing Galaxies on your Laptop

Galaxies may be terrible at their one and only job—producing new stars—but they are doing the best they can

12 minute read Matt Orr
Learning from Evolution, the Original Engineer

Learning from Evolution, the Original Engineer

Life has evolved complex survival mechanisms via equal parts hacking and engineering. Math tells us how these systems work

12 minute read Noah Olsman
The Vibrance of Natural Color

The Vibrance of Natural Color

Nature produces colors with an intensity and diversity that humans have tried to replicate for centuries

10 minute read Alison Koontz
Snowballs in the Desert

Snowballs in the Desert

In a remote desert valley, Caltech scientists are hunting for glaciers that once covered the Earth

12 minute read Dustin Morris
Ripples from Colliding Black Holes

Ripples from Colliding Black Holes

Distant black holes collide and release abundant secrets about the universe, and advanced computer simulations are helping us interpret them faster than ever

13 minute read Vijay Varma
The Circuitry of Creativity: How Our Brains Innovate Thinking

The Circuitry of Creativity: How Our Brains Innovate Thinking

New research suggests that the traditional left brain/right brain model may be vastly oversimplifying the act of creativity

8 minute read Alison Koontz
Our Most Intimate Allies

Our Most Intimate Allies

Long before probiotics were in the news, our bodies recognized that the bacteria in our gut could be valuable lifelong partners

9 minute read Gregory Donaldson
Digging into Earth’s Muddy Past

Digging into Earth’s Muddy Past

The shells of tiny, ancient organisms buried deep in ocean mud hold the secrets of Earth's history and clues to its future

12 minute read Dan Johnson
Human-induced Earthquakes: A Blessing and a Curse

Human-induced Earthquakes: A Blessing and a Curse

Earthquakes caused by humans can be unexpected and destructive, but also have a lot to teach us about how natural earthquakes originate

10 minute read Stacy Larochelle
Seeing Through the Fog

Seeing Through the Fog

Unscrambling light can give us an unprecedented view inside our own bodies

8 minute read Josh Brake
In Search of a Better Leaf

In Search of a Better Leaf

By learning from nature, scientists hope to harness the power of the sun to build a more sustainable future

9 minute read Paul Kempler
Color Perception: Experiments In the Sciences and The Arts

Color Perception: Experiments In the Sciences and The Arts

Modern theories of human color vision are derived from both the arts and the sciences

9 minute read Alison Koontz
Science in the Skies

Science in the Skies

A flying laboratory gives us unprecendented insight into the far reaches of the Earth's atmosphere

11 minute read Hannah Allen
Imagining a Living Universe

Imagining a Living Universe

By studying the origins of life Earth, we can imagine where it might exist elsewhere in the universe

11 minute read Elise Cutts
Storms on Jupiter

Storms on Jupiter

Cyclones lasting centuries rage across the surfaces of distant planets

8 minute read Harriet Brettle
A History of Color

A History of Color

Art and science, seemingly opposite forces, are driven by the same desire to understand the nature of existence

11 minute read Alison Koontz
Robots in the Deep

Robots in the Deep

Deep in the frigid waters of Antarctica, ocean robots are teaching us important things about climate change

10 minute read Giuliana Viglione
Approaching a Genius: The Einstein Papers Project

Approaching a Genius: The Einstein Papers Project

Digging through a brilliant mind in search of lessons for today's world

12 minute read Melissa Büttner
Stolen

Stolen

The best ideas can come from the most unexpected places

11 minute read Mike Wong
Science, Engineering, and the Next Big Earthquake

Science, Engineering, and the Next Big Earthquake

Science and engineering are powerful tools, but the lessons of one must be applied to the other so we're ready when disaster strikes

11 minute read Daniel Bowden
How do you See an Exoplanet, Anyway?

How do you See an Exoplanet, Anyway?

Not content to look at the stars, Caltech scientists search for the planets orbiting them

13 minute read Rahul Patel
Chemical Archaeology: Digging up our Chemical Past in Interstellar Space

Chemical Archaeology: Digging up our Chemical Past in Interstellar Space

Using powerful telescopes, we can look back in time to untangle our chemical history

13 minute read Olivia Harper Wilkins
Brainception: Learning How the Brain Learns About Itself

Brainception: Learning How the Brain Learns About Itself

Inch by inch, Caltech scientists are learning about the mystery of how we learn

14 minute read Sophie Miller
Cosmic Forensics: Investigating the Deaths of Stars

Cosmic Forensics: Investigating the Deaths of Stars

One scientist's quest to understand an unexplained flash from the sky

9 minute read Anna Ho
Beauty in Chaos

Beauty in Chaos

How scientific tools can be used to find patterns in messy swirls of air

13 minute read Tess Saxton-Fox
The Autonomous Future of Science

The Autonomous Future of Science

Why robots taking our jobs isn't so bad for science

12 minute read Zachary Erickson
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