Blue Light Battle

Time for bed … but first, just ONE MORE TikTok video! This is Sandra Tsing Loh with the Loh Down on Science.  Blue light naturally comes from the sun. But modern humans have developed EXTRA exposure! Think artificial light sources like LED lights, tablets and cell phone screens! How do

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Amazing Sight

Up-close black and white image of an adult man

Amazing Grace, how sweet the…sight?!  This is Sandra Tsing Loh with the Loh Down on Science. When light enters the eyes, the light-sensitive cells send signals to the brain. Let there be sight! But the disease Retinitis Pigmentosa, or RP, can cause loss of vision. José-Alain Sahel at Sorbonne University,

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Sweat it Out!

Bulb light on

America runs on…sweat? This is Sandra Tsing Loh with the Loh Down on Science. A morning run – so invigorating! The feeling of sweat rolling down your back? Yuck! But can sweat be useful? Xueping Zhang and colleagues from the National University of Singapore had a “dry idea!” The team

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Mold Slime Salesman

Where are those Spanx I ordered?! This is Sandra Tsing Loh with the Loh Down on Science. We want our packages delivered ASAP! Sounds simple, right? Well, not computationally. A computer measures distance for every possible combination of delivery paths. For eight stops…that’s two thousand paths! Is the smarter way.

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Seeing the Blues

Angry birds… there’s hidden danger! This is Sandra Tsing Loh with the Loh Down on Science. These days, we spend a LOT of face time with our electronic devices.  But whether we notice or not, these gadgets emit a LOT of blue light. Should we be concerned? To find out,

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Blackest Black

Ladies love a guy dressed in black…especially lady SPIDERS! This is Sandra Tsing Loh with the Loh Down on Science, saying that’s right! Male peacock spiders use a slick dance and super black spots to woo the ladies. These areas aren’t just dark, they’re SUPER dark! Meaning, they absorb more

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Glowing Sharks

Lions and tigers and glowing sharks, oh my? This is Sandra Tsing Loh with the Loh Down on Science, saying: We’re gonna need a bigger boat! Lots of ocean-dwelling animals glow. Biofluorescence allows a marine animal–say, a shark–to take in light and convert it to a different color. What color?

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I See UVC

Can cameras “see” invisible light? This is Sandra Tsing Loh with The Loh Down on Science. My sunscreen protects against U-V-A and U-V-B, but what about U-V-C!?!?!? Yes, there is a THIRD type of U-V light! Fortunately we are protected from it by the earth’s ozone. UNfortunately, there are weak

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Microscopic Journey

Adventure thru innerspace! And beyond! This is Sandra Tsing Loh with the Loh Down on Science. The Disneyland Tomorrowland ride let visitors travel “thru inner-space”. Riders were shrunk down to smaller than an atom, beyond the limit of microscope technology. Like in that sci-fi movie “Fantastic Voyage!” Cool, right? Current

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