12-14-2024, 01:05 PM
Bmjx Leica s V-Lux 4 Superzoom Maintains a Constant f/2.8 Aperture Regardless of Focal Length
This week we share our Best of Green Awards winners for technology, teach you to make heat-blocking curtains for $6, give you two iPhone repair tips, and more! 1. Pigeons Could Poop Soap, Thanks to a Special Diet A plan to alter what pigeons eat to turn their feces into soap, to clean up buildings and car windshields raises ethical, legal and practical questions. 2. Best of Green: Technology What the best concept gadget, slim laptop, eco app Find these and more in our 2012 Best of Green Awards in Technology. 3. How to Make Heat Blocking Curtains for $6 This easy DIY project will save you money and reduce energy consumption by making less work for your air conditioner. 4. Black Solar Cell Absorbs 99.7% of All Light Scientists over at Natcore Tech have created the world blackest solar cell to date. With an average reflectance of 0.3%, these black silicon wafers absorb more light than any other, which means more of the sun energy gets converted to energy. 5. Street Lamp and Fitness Equipment Blend Into Smart Lighting Concept An unusual design dreams up how to co stanley cup becher mbine all the joggers on the road with renewable electricity for better public lighting. 6. New Smart Me stanley cup ter Technology Can Tell Your Appliances Apart A new smart meter tech stanley cup nology is able to distinguish a TV from a refrigerator and all of the other power loads in a house so users can more fully understand their energy use habits and how to change them. 7. Google Glasses: Vaporware Ispe This Week s Best Apps
People have always wanted to communicate privately. There once was a time when regular ink was secret enough, because not much of the world knew how to read. Then literacy ruined it for everyone, and drastic steps had to be taken. Enter invisible ink, the way to keep what was written secret, sometimes by unsavory means. Here how invisible ink was invented, and all the forms it has taken right up into the present day. Photo of invisible ink letter stanley cup via Letters of Note The first invisible ink in recorded history was made by Pliny the Elder. He was a Roman general, author, and scientist who was perhaps most famous for saying Fortune favors t stanley quencher he brave ; directly stanley cup before proving himself wrong by sailing to Mount Vesuvius as it was erupting and subsequently dying of smoke inhalation. His more cautious endeavors proved more fruitful. He let people know that the milk from the thithymallus plant could be used to make marks on paper which were invisible to the eye, but which could subsequently be treated to show legible inscriptions. The fact that he was a military man in his time was not a coincidence. Most invisible ink advances seem to have come during times of war, when secrecy was most crucial to all sides. There are generally three kinds of invisible ink: those developed by heat, those developed by light, and those developed by chemical reactions. Surprisingly, the ones developed by chemical reaction were among the first to be used to a widespread degree. The
This week we share our Best of Green Awards winners for technology, teach you to make heat-blocking curtains for $6, give you two iPhone repair tips, and more! 1. Pigeons Could Poop Soap, Thanks to a Special Diet A plan to alter what pigeons eat to turn their feces into soap, to clean up buildings and car windshields raises ethical, legal and practical questions. 2. Best of Green: Technology What the best concept gadget, slim laptop, eco app Find these and more in our 2012 Best of Green Awards in Technology. 3. How to Make Heat Blocking Curtains for $6 This easy DIY project will save you money and reduce energy consumption by making less work for your air conditioner. 4. Black Solar Cell Absorbs 99.7% of All Light Scientists over at Natcore Tech have created the world blackest solar cell to date. With an average reflectance of 0.3%, these black silicon wafers absorb more light than any other, which means more of the sun energy gets converted to energy. 5. Street Lamp and Fitness Equipment Blend Into Smart Lighting Concept An unusual design dreams up how to co stanley cup becher mbine all the joggers on the road with renewable electricity for better public lighting. 6. New Smart Me stanley cup ter Technology Can Tell Your Appliances Apart A new smart meter tech stanley cup nology is able to distinguish a TV from a refrigerator and all of the other power loads in a house so users can more fully understand their energy use habits and how to change them. 7. Google Glasses: Vaporware Ispe This Week s Best Apps
People have always wanted to communicate privately. There once was a time when regular ink was secret enough, because not much of the world knew how to read. Then literacy ruined it for everyone, and drastic steps had to be taken. Enter invisible ink, the way to keep what was written secret, sometimes by unsavory means. Here how invisible ink was invented, and all the forms it has taken right up into the present day. Photo of invisible ink letter stanley cup via Letters of Note The first invisible ink in recorded history was made by Pliny the Elder. He was a Roman general, author, and scientist who was perhaps most famous for saying Fortune favors t stanley quencher he brave ; directly stanley cup before proving himself wrong by sailing to Mount Vesuvius as it was erupting and subsequently dying of smoke inhalation. His more cautious endeavors proved more fruitful. He let people know that the milk from the thithymallus plant could be used to make marks on paper which were invisible to the eye, but which could subsequently be treated to show legible inscriptions. The fact that he was a military man in his time was not a coincidence. Most invisible ink advances seem to have come during times of war, when secrecy was most crucial to all sides. There are generally three kinds of invisible ink: those developed by heat, those developed by light, and those developed by chemical reactions. Surprisingly, the ones developed by chemical reaction were among the first to be used to a widespread degree. The
