""Heroes of Today"" is a book written by Mary Rosetta Parkman and published in 1917. The book is a collection of biographical sketches of several notable figures of the time, including John Muir, John Burroughs, Wilfred Grenfell, Robert F. Scott, Samuel Pierpont Langley, and others. The author presents these individuals as heroes who have made significant contributions to society through their work in various fields such as science, exploration, and...