Until 3 billion years ago, Mars was a wet planet much like Earth. It had land, an extensive atmosphere and an ocean that covered two thirds of the northern hemisphere as well as smaller bodies of water. But significant climate change caused the water and atmosphere to boil away, leaving Mars a dry and arid planet. Or so we thought… then came the news from Nasa – Water found on Mars!
How Much Sleep Do Kids Need?
Julianne Robertson investigates the world of snoozes, forty winks, cat naps and snoring. What is SLEEP, why do we need it, and how much sleep do kids need?
A couple of nights ago I was feeling really, really tired, so I went to bed early. I slept soundly, without even dreaming, until about 5am, when I woke up. It felt like I’d only been sleeping for about 5 minutes! After that, I fell back to sleep but had lots of vivid dreams and when I woke up a couple of hours later, it felt like I’d been asleep for a long time. After all that I still felt well-rested and was ready for the day.
All this made me wonder – what IS sleep? Why is it that some nights we feel like we’ve had a really good nights’ sleep, while other nights we still feel tired when we wake up in the morning? Here’s what I’ve discovered about sleep…
Have you ever wondered…about your teeth?
Have you ever had a tooth pulled out by a dentist? If you did, you may have noticed something odd. The roots were probably still attached to the tooth, unlike when a tooth falls out normally. What happens to the root of a tooth, how do teeth grow and why is it important that you take care of them? Samantha Gouldson investigates!
Contribute to Jump! Mag
Would you like to contribute to Jump! Mag? Email us, using the Contact Us form at the bottom of this page.
Pre-teens or teens are especially welcome to write for our #writtenbyyou section. Please have a parent or guardian contact us to give permission for you to submit an article.
Parents – please resist the urge to ‘tidy up’ your child’s contribution. We only edit articles by our pre-teen or teen readers if the meaning is unclear, not to correct grammar or spelling mistakes. Your child has an authentic voice; we don’t meddle with it.



