How does HDTV work?
The crisp, sharp images we see on digital televisions are the result of how the signal is broadcast, received and displayed.
Can humans sneeze while sleeping?
We don’t sneeze when we are sleeping, thanks to our brains and our location.
What is a red-giant?
Near the end of a star’s life, the temperature in its core rises and causes the star to expand into a red-giant.
Which star is the largest?
The red hypergiant VY Canis Majoris holds the current distinction for being the largest star ever observed, in terms of volume, measuring 2,600 times larger than the Sun.
Ask Us: How do lizards survive when they lose their tail?
Most skinks and some of the dragon species can drop their tail quickly to avoid being captured by a predator.
Ask Us: What gives bird feathers their colours?
Birds can see a larger spectrum of colours than most of us, and they flaunt a variety of eye-catching plumage. Pigments called melanins, carotenoids and porphyrins made in the bird’s skin produce most…
Ask Us: How do scientists see atoms?
With high-powered microscopes. Most of our early knowledge of atomic structure was based on indirect experimental observations, but in 1955, Erwin Muller and Kanwar Bahadur of Penn State University in the US imaged…
