1. Video content

    Video caption: How long does it take to get to Mars and why is it so difficult?

    Summer 2020 is a popular time for missions to Mars because of the way the planets align - but how long does it take to get there?

  2. A Moment in the Sun - The Terrestrial Planets

    Video content

    Video caption: The four inner planets were born the same, yet have lived radically different lives. Why?

    The rocky planets Mercury, Venus, Earth, and Mars were born at the same time from the same material - yet have lived radically different lives. What immense forces are at play?

  3. Video content

    Video caption: Flat-Earther launches DIY rocket

    "Mad" Mike Hughes wants to prove thousands of years of human knowledge wrong.

  4. Video content

    Video caption: Facts and figures behind our climate and weather

    How is our weather affecting the planet? Ben Rich looks at the latest data to help track our changing climate in the first of our new monthly series, Climate Check.

  5. By Paul Rincon

    Science editor, BBC News website, The Woodlands, Texas

    Binary asteroid

    Researchers outline compelling evidence for an occasion when the ancient Earth was battered by two asteroids at the same time.

    Read more
  6. How YouTube converted people to flat Earth

    Video content

    Video caption: Flat Earth: why is YouTube helping spread conspiracy theories?

    Many people who believe the Earth is not round first heard the idea on YouTube. But how important was the video-sharing website in helping the flat Earth movement grow?