How To Make A Rocket For Less Than A Dollar

This gif shows mushroom sprouting. It’s so cool!

Flamboyant Cuttlefish by  Beyond The Water Surface

Physicist Andreas Wahl uses Extreme Experiments to Prove Physical Concepts.

In this edition, Wahl is attempting to show that “It’s harder to create movement in water than in air, because water molecules are closer together than air molecules”. 

To prove this he puts himself in front of a gun submerged under water, which shows the strange reaction of the bullet in a denser medium.

(Andreas Wahl)

INSIDE THE INVENTIVE MIND Matt Ganis IBM Social Media Analytics  Olympian Internet Firewall Creator

“I think we learn as we play – the silly experiments we come up with today could be at the core of very serious solutions we develop tomorrow.”

Density experiment. Salt water has a higher density than fresh water, causing the egg to float in it! 

Materials: 1. A wooden skewer 2. A clothespin 3. 1 cup of water 4. 2-3 cups of sugar 5. A tall narrow glass

Steps: 1. First, clip the skewer into the clothespin so that it hangs down inside the glass and is 1 in from the bottom of the glass. 2. Next, remove the skewer and clothespin and put the aside. 3. Then, pour the water into a pan and boil it. 4. Next, pour ¼ cup of sugar into the boiling water and stir till it dissolves. 5. Then, keep adding more sugar, each time stirring until it dissolves. 6. Next, remove the heat and allow it to cool for 20 minutes. 7. Then, ask an adult to pour the mixture into the jar to the top. 8. Next, submerge the skewer into the glass so it is hanging straight down the miss without touching the sides. 9. Finally, put it somewhere where it would not be disturbed and wait for the sugar crystals grow over the next 3-7 days.

Lesson: When you mix water and sugar, you created a saturated mixture, which means that the water could only hold the sugar if it was very hot. As the water cools, the sugar turns into crystals on the skewer.

Materials: 1. Half a lemon 2. Water 3. Spoon 4. Bowl 5. Cotton Bud 6. White Paper 7. Lamp Steps: 1. First, squeeze the lemon juice into the bowl and add 6 drops of water. 2. Next, mix the water and lemon juice with the spoon. 3. Then, dip the cotton bud into the bowl and write a message onto the paper. 4. Next, wait for the juice to dry. 5. Finally, heat the paper by holding it close to the light bulb to see the message. Lesson: Lemon juice is a substance that oxides and turns brown when heated. Other substances which work in the same way are orange juice, honey, milk, onion juice, vinegar, and wine. Invisible ink can also be made using chemical reactions or viewing the message with a UV light.

Materials: 1. Water 2. A clear plastic bottle with a cap 3. Dish washing soap 4. Glitter Steps: 1. First, fill the bottle until it reaches 3 quarters full 2. Next, add 3 drops of dish washing soap in the bottle. 3. Then, sprinkle in 3 pinches of glitter. 4. Next, put the cap on tightly 5. Finally, turn the bottle upside down. And hold it by the neck. Quickly, spin the bottle in a circular motion for 10 seconds and stop to see a mini tornado in your bottle. Lesson: When you spin the bottle, it creates a water vortex. The water is spinning around the center of the vortex because of centripetal force. Centripetal force is an inward force directing an object or fluid towards the center of its circular path. Examples of natural vortexes are tornadoes, hurricanes, and waterspouts.

I’ll say it again: Scientists have created a synthetic stingray that’s propelled by living muscle cells and controlled by light.

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But the ultimate goal isn’t a cyborg sea monster - it’s a human heart.

“I want to build an artificial heart, but you’re not going to go from zero to a whole heart overnight,” says Kit Parker, a bioengineer and physicist at Harvard University’s Wyss Institute. “This is a training exercise.”

Full, fascinating story here.