From identifying venomous animals to recognizing our favorite beverage on a crowded shelf, color is a critical part of how we interact with and interpret the world around us. How do our brains know that a can of soda is from our favorite brand by color alone? Human perception of color begins with light.
Grinding up dewy green herbs and red-clay earth is easy, but how do you bottle the twilight-blue of the evening sky or capture the storm-tossed indigo of the ocean? Since humans first began to depict the world on cave walls, blue has proved to be an elusive pigment.
In May 2018, California passed a law requiring that almost all new homes built in the state must have solar power after January 2020. California becomes the first state to pass such a law to support Governor Brown’s initiative to reduce carbon emissions by 40 percent by 2030.
Before the advent of microscopy, scientists such as Leonardo da Vinci had to surreptitiously dissect the human body to gather insights into its functional anatomy. Now, two-photon microscopy has further advanced our ability to peer into living tissues with minimal intervention. For instance, two-photon microscopy allows your window of vision to penetrate through a living mouse’s brain and marvel at a neuronal cell’s inner workings. Pan the microscope underneath the skin and you will see hair follicle stem cells dividing and regenerating in real-time. Over a tumor bulge, you can observe metastatic cancer cells migrating and invading blood vessels. The mechanics of this visual journey relies on two photons meeting each other at the same place at the right time.
Outside of normal sneezing exists an entirely separate group of sneezing-related phenomena. One particularly common condition that affects up to 35% of Americans is called the photic sneeze reflex. This reflex is conveniently abbreviated as ACHOO (Autosomal Dominant Compulsive Helio-Ophthalmic Outburst syndrome), so named because it involves sneezing in response to sudden increases in light intensity.
If you are 18 years of age, you have never known a world without a camera phone. Today, the quality of digital phone cameras is crucial to social media platforms, to businesses seeking visibility, and to people documenting as much of their lives and environments as possible. In this article, we will explore the functions of camera mechanics that created one of the most essential remote sensing devices in human history.
Jellyfish and fireflies – what is something these two animals have in common? They both glow! This emission of light by these organisms is called bioluminescence, a term combining the Greek word “bio” meaning “life” and the Latin word “lumen” for “light.” Bioluminescence is produced through a chemical reaction that occurs within cells. Over the years, scientists have gained an appreciation for bioluminescence and have adapted it not only for research and medical purposes, but also as a platform for their passion for art. This artwork, as captivating as the living organisms that it originates from, has become a beautiful way of introducing people to the wonders of biology.
Light has fascinated humanity since the beginning of civilization. From the alignment of the rocks at Stonehenge to the second line of the Torah: “Then God said, ‘Let there be light;’ and there was light,” virtually every human culture has appreciated the importance of light for survival.