Henry Carter Hull

Black powder, the world's first chemical explosive, was originally developed in the seventh century, during China's Tang dynasty. It was a crude mixture at first, but over time chemists discovered the optimum proportion of sulfur, charcoal, and nitrates, as well as the best way to mix them so that the particles of each component were tiny and homogenous, resulting in a complete and powerful reaction. Author and chemistry buff Simon Quellen...

Some low-frequency sounds—such as noise from storms or truck engines—can make you feel dizzy and nauseated. An index finger's light touch can stop people from losing balance. You are more prone to trip when you think someone is watching you. A breakthrough in improving balance as we age might just come through the study of the Achilles tendon. A person gets "falling down drunk" due to a tiny structure in the inner ear that floats when it becomes...

Explore the amazing science behind constellations.

Novus or do seclorum sounds like something from a magic spell doesn't it? So why is it on the back of the dollar bill? Here's your chance to find out what the mysterious symbols and sayings on a dollar bill mean.

‘Exploring Space’ looks at the development of space science and knowledge from ancient times through the present and into the future. You will learn about everything from the first telescopes to the newest spacecraft that are exploring space right now. You will discover distant planets and other galaxies in the far reaches of the universe. So come on a fantastic journey into the world of space exploration! Sci-Hi is an engaging, comprehensive,...

In a world half of light, half of darkness, where science and magic strive for dominance, there dwells a magical being who is friendly with neither side. Jack, of the realm of shadows, is a thief who is unjustly punished. So he embarks on a vendetta. He wanders through strange realms, encountering witches, vampires, and, finally, his worst enemy: the Lord of Bats. He consults his friend Morningstar, a great dark angel. He is pursued by a monstrous...

During a field trip to Mount Olympus, Belle Song accidentally injures her leg on a strange rock. The rock turns out to be a rare and valuable mineral that can make space travel much more efficient. The planet's biggest mining company, BAMCorp, wants to claim the site for itself. But mining the mineral could threaten much of Mars' all-important water supply. Things soon get tense when protestors begin to clash with company officials. Belle and her...

Humans and intelligent machines bump up against each other in a parallel search for meaning and purpose during the period ensuing the most recent mass extinction. Yet, the world is not without beauty. The desert is majestic, and the historic city a place of artistry.In a beginning that was meant to be the end, Chance-bot is waiting on the street for the recycling truck with the simple instructions to surrender to fate. The bot surrenders to Ziggy....

H.A.L.F. 9 has taken his first breath of desert air and his first steps in the human world. Created to be a weapon, he proved too powerful for his makers, hidden from humans and sedated. But H.A.L.F. 9 has escaped the underground lab he called home, and the sedation has worn off. He has never been more alive. More powerful. Or more deadly. Erika Holt longs to ride her motorcycle east until pavement gives way to shore. She bides her time until graduation...

When Rosalen Maldonado tinkers with the derelict freighter, she's just hoping to prove she deserves a scholarship to University. She certainly doesn't count on waking the ship's damaged AI or having three stowaways, Micah Rotherwood and brothers Jem and Barre Durbin, along for the ride. They all have their private reasons for hiding aboard, and lives they are seeking to escape, but if the accidental crew can't work together and learn to trust each...