One of the most effective ways to protect the environment is to make markets work for environmental goals rather than against them, using tools such as tradable permits and payments for ecosystem ...

Imagine sitting on a city bus full of strangers. Look around at the people riding with you. If you needed help, how would you choose whom to trust? By scanning people's faces, your brain is already ...

Kareem El-Badry, associate professor of astronomy at Caltech, has been selected as one of 20 Packard Fellows for 2026. The Packard Fellowships for Science and Engineering provide just under $990,000 ...

Limbs evolved as a means of locomotion. From the primitive rotating flagella of bacteria to the wings of flies and even our own legs, animals use these appendages to travel to find food or mates, or ...

On October 11, NASA's Perseverance rover broke the record for the furthest distance traveled by a vehicle on another world. Initially set by NASA's Opportunity rover in 2014, Perseverance has now ...

When Alex Blum was growing up in the Black Forest region of Germany, he was consumed by what some might consider an unusual pastime: reading fantasy books and trying to reconstruct the implicit ...

Humans throughout history have invented a variety of ways to fight back against troublesome bacteria. But bacteria live in a dangerous world too. The human body and other bacteria-rich environments ...

Caltech students come from all over the world, bringing diverse experiences, perspectives, and passions. They share an unbridled sense of curiosity and an extraordinary aptitude for science, ...

The California Institute of Technology ("Caltech," "we," or "us") operates a range of websites, applications, research platforms, digital services, and in-person programs and activities across many ...

In 2015, the Laser Interferometer Gravitational-Wave Observatory, or LIGO, made history when it made the first direct detection of gravitational waves, or ripples in space and time, produced by a pair ...

The human brain has 100 billion neurons, making 100 trillion connections. Understanding the precise circuits of brain cells that orchestrate all of our day-to-day behaviors—such as moving our limbs, ...

Engineers at Caltech have developed a method for 3-D printing pure and multicomponent metals, at a resolution that is, in some cases, an order of magnitude smaller than previously possible. The ...