What is optogenetics? Trace light-sensitive ion channels from algae to neuroscience, then examine the evidence and limits of the reported visual-recovery case.
How can a diet drink taste sweet with few calories? Learn how small sweetener amounts work, why sweetness differs from energy, and what health studies can show.
How did science grow from stone tools to artificial intelligence? Follow the discoveries, shared ideas and experiments behind the technology we use each day.
Why is the sky blue while space looks black? Follow sunlight scattering in air, the longer path at sunset, and why violet light does not dominate what you see.
Why can October feel so hot in India? Follow retreating monsoon clouds, wet ground and humid air to understand why sweat may cool you less well during the day.
Is negative energy real? Explore the Casimir effect, energy relative to the vacuum, and the limits that keep a measured force from becoming a warp drive.