Zap, zap, zap! Our bodies are electric
Our bodies rely on electricity to function. Tiny electrical signals called action potentials race through the brain, heart, muscles and bones on a constant basis. In the heart, the sinoatrial node acts as the natural pacemaker, generating electrical signals that cause the heart to contract in a regular rhythm. The rate is controlled by the […]
34-year-old Hubble Telescope does it again – NASA uncovers unusual galaxy using Hubble photography
The 34-year-old Hubble Space Telescope captured an image of an unusual galaxy called NGC 4694. Most galaxies are either spiral or elliptical in shape, but this one is difficult to classify. NGC 4694 has a smooth, armless disk like an elliptical galaxy, but it still has ongoing star formation in its core, unlike typical ellipticals. […]