In the 19th century, interference allowed scientist Thomas Young to demonstrate that light acts like a wave. He shined light through two narrow slits to cast an image on a screen behind them.

The Rubin Observatory released its first magnificent images of the cosmos on Monday (June 23) — and included a special asteroid bonus.

From hand-sized lantern sharks that glow in the deep sea to bus-sized whale sharks gliding through tropical waters, sharks come in all shapes and sizes.. Despite these differences, they all face ...