This small, polished fossil was once a living sea creature – 150 million years ago! These ammonites moved by jet propulsion, much like the nautilus that exists today. And like a nautilus, their shells grew in an amazing spiral pattern.
For your chance to win a polished ammonite slice from www.professorplums.com.au, send us a rubbing of something from your garden with a textured pattern. (You can make a rubbing by laying a piece of paper over something textured, and then rubbing a soft pencil or crayon back and forth over the paper to reveal an image of the textured object below.)
To be in the running to win this fantastic prize, send us your entry with your name, age, address and Double Helix subscriber number*. Get a parent's permission, ask them to sign each piece of paper, and then send it to CSIRO Double Helix Competitions, GPO Box 1700, Canberra ACT 2601 by 15 April 2017. Or, email your entry with your details to email@example.com. The best entries in each competition will win the prize.
*Don't know your subscriber number? Check the address label that came with your magazine or subscribe now.
1. To be valid, all entries must include name, address, age of entrant and Double Helix subscriber number. 2. All entries become the property of CSIRO and will not be returned. 3. Entering the competition assigns copyright to CSIRO. 4. Entries will be judged on creative merit, not by chance. 5. Age will be taken into consideration when judging. 6. All decisions on competitions are final and will not be discussed further. 7. Winners will be notified by mail and the names of competition winners only will be published three issues later. 8. CSIRO shall not be liable for any damage or loss suffered in connection with any of the prizes. 9. Any change in value of the prize between the publishing date and the delivery date is not the responsibility of CSIRO. 10. In the case that prizes become unavailable after the publishing date, CSIRO will send an alternative prize. 11. The closing date for this issue's entries is 15 April 2017. 12. Competition entries must be the entrant's own work. 13. It is the responsibility of the entrant to ensure copyright of their entry is not assigned elsewhere. 14. Winners should allow six weeks for prize delivery.