About 2 million years ago, the solar system may have collided with a cold cloud of gas, shrinking the sun's protective bubble and exposing Earth to space.
The new record holder for world's largest genome goes to a tiny fern that grows on a few islands in the South Pacific. Read more about the rare fern here.
Dark nebulae are clouds of gas and dust in space. They block the light of stars shining behind them. Often, they're locations where new stars are forming.
Kelly Kizer Whitt - EarthSky’s nature and travel vlogger on YouTube - writes and edits some of the most fascinating stories at EarthSky.org. She's been writing about science, with a focus on astronomy, for decades. She began her career at Astronomy Magazine and made regular contributions to other outlets, including AstronomyToday and the Sierra Club. She has nine published books, including a children's picture book, Solar System Forecast, and a young adult dystopian novel, A Different Sky.