Ginkgo

The ginkgo is a tall and slender picturesque deciduous tree with fan-shaped leaves. A “living fossil,” the ginkgo is the only remaining species of a large order of gymnosperms that existed in the Triassic period; its form has not changed in millions of years. A combination of amazing disease resistance, insect-resistant wood, and the ability to form aerial roots and sprouts helps ginkgoes live more than 2,000 years. Where does the name “ginkgo biloba” come from? Discuss

Paul Robeson (1898)

Paul Robeson was an American stage actor, singer, and political activist. The son of a runaway slave who became a minister, Robeson graduated from Rutgers, where he was an All-American football player, and then from Columbia University law school, before turning to theater. Known for his superb bass-baritone, he gained fame for his stage role in Othello. He later became an outspoken activist on issues such as racial justice and international peace. Why was his passport revoked in 1950? Discuss

Tiger's Eye

Tiger’s eye is a yellow-brown, semiprecious chatoyant gemstone consisting of quartz with parallel veins of silicified altered crocidolite. The gems are usually cut en cabochon, meaning with a convex, rounded surface that is polished but unfaceted, in order to best display their chatoyancy. Notable sources of tiger’s eye include the US, Canada, China, Brazil, Namibia, India and Burma. What is tiger iron? Discuss

Krak des Chevaliers Conquered (1271)

One of the most important preserved medieval military castles in the world, the Krak des Chevaliers in Syria was the headquarters of the Knights Hospitaller during the Crusades. The largest Crusader fortress in the Holy Land, it could hold up to 2,000 soldiers and included a chapel, a storage facility, and two stables that could accommodate up to 1,000 horses. Though it is estimated that the Hospitallers could have withstood a siege for five years, the fortress was captured in 1271. How? Discuss

David Rittenhouse (1732)

Rittenhouse was a renowned American astronomer, inventor, mathematician, surveyor, and the first director of the US Mint. A clockmaker by trade, he developed many mathematical instruments, as well as perhaps the first telescope in the US. He later used tools he created to establish several state lines as well as part of the boundary known as the Mason-Dixon Line. What is said to have happened to Rittenhouse in 1769 as he observed the rare transit of Venus that he had long anticipated? Discuss

Wasabi

Wasabi is a member of the cabbage family that grows naturally along stream beds in mountain river valleys in Japan. Its root is used as a strong, mustard-hot spice that produces vapors that burn the sinus cavity rather than the tongue. Wasabi paste is often served with sushi and sashimi, but because true wasabi is so expensive, most American and Japanese sushi bars serve imitation wasabi made of what? Discuss