<p><strong>Best-selling author Theodore Gray is back with all-new, spectacular experiments that demonstrate basic principles of chemistry and physics in thrilling, and memorable ways. </strong></p><p></p><p>For nearly a decade, Theodore Gray has been demonstrating basic principles of chemistry and physics through exciting, sometimes daredevil experiments that he executes, photographs, and writes about for his monthly <em>Popular Science</em> column "Gray Matter."</p><p></p><p><em>Theo Gray's Mad Science: Experiments You Can Do at Home, But Probably Shouldn't</em>, published by Black Dog in 2009, collected Gray's <em>Popular Science</em> columns, along with hundreds of photographs, many of which were not published with the original columns.</p><p></p><p>Now comes the second volume of mad-scientist experiments, which includes more dramatic, enlightening, and sometimes daring demonstrations in which Gray dips his hand into molten lead to demonstrate the Leidenfrost effect; crushes a tomato between two small magnets to demonstrate the power of neodymium-iron-boron magnets; and creates trinkets out of solid mercury to demonstrate how the state of matter depends very much on the temperature at which it exists.</p><p></p><p>Other experiments include:</p><p>A foil boat floating on an invisible sea!</p><p>DIY X-ray photos!</p><p>A bacon lance that cuts steel!</p><p>Charging a smart phone with apples and pennies!</p><p>And dozens more!</p>