The 50 Best Inventions of 2009

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The Tank-Bred Tuna

Davies and Starr for TIME

At 8:47 a.m. on March 12, fish history happened in Port Lincoln, Australia. A tankful of southern bluefin tuna — regal, predatory fish prized for their buttery sashimi meat — began to spawn, and they didn't stop for more than a month. "People said, 'It can't be done, it can't be done,'" says Hagen Stehr, founder of Clean Seas, the Australian company that operates the breeding facility. "Now we've done it." Scientists believe the breeding population of the highly migratory southern bluefin has probably plummeted more than 90% since the 1950s. Others have gotten Pacific bluefin to spawn and grow in ocean cages, but by coaxing the notoriously fussy southern bluefin to breed in landlocked tanks, Clean Seas may finally have given the future of bluefin aquaculture legs. (Or at least a tail.)

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The Best Inventions

1. The Best Invention of the Year: NASA's Ares Rockets
2. The Tank-Bred Tuna
3. The $10 Million Lightbulb
4. The Smart Thermostat
5. Controller-Free Gaming
6. Teleportation
7. The Telescope for Invisible Stars
8. The AIDS Vaccine
9. Tweeting by Thinking
10. The Electric Eye
11. The Mercury Probe
12. The Personal Carbon Footprint
13. The Solar Shingle
14. The Handheld Ultrasound
15. The YikeBike
16. Vertical Farming
17. The Planetary Skin
18. The $20 Knee
19. A Watchdog for Financial Products
20. The Electric Microbe
21. The Bladeless Fan
22. The Custom Puppy
23. The Cyborg Beetle
24. The Biotech Stradivarius
25. The Nissan Leaf
26. The Robo-Penguin
27. The Universal Unicycle
28. YouTube Funk
29. Dandelion Rubber
30. Wooden Bones
31. The Living Wall
32. The School of One
33. The No-Punt Offense
34. The Human-Powered Vending Machine
35. The Handyman's X-Ray Vision
36. Meat Farms
37. Packing, Improved
38. The Foldable Speaker
39. The Levitating Mouse
40. The Edible Race Car
41. The High-Speed Helicopter
42. The Supersuit
43. The Eyeborg
44. Spiderweb Silk
45. The Sky King
46. The Smart Bullet
47. The Fashion Robot
48. The 3-D Camera
49. The Newest Cloud
50. The World's Fastest (Steam-Powered) Car

The Five Worst Inventions

1. The Five Worst Inventions

Poll Results

1. Poll Results

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