Learn about this physicist who postulated that dinosaurs were wiped out after an asteroid hit the earth. Includes a photo of him with his son.

Biography introduces the achievements of this Nobel Prize winning physicist and chronicles his childhood.

Article, published in the National Academy of Engineering's journal Memorial Tributes, recognizes Alvarez's scientific contributions.

Reference for younger readers details Alvarez's Asteroid Impact Theory, which explained the K-T extinction. Includes a list of chemical evidence.

Read an essay, published in the 75th anniversary issue of this science journal, details Luis and son Walter Alvarez's dinosaur extinction theory.

Enjoy a profile of this renowned physicist who was awarded the Nobel Prize for his work with subatomic particles.