73. The Modern Synthesis of Evolution

72. Sex, Sexual Reproduction, and Sexual Selection

71. Mechanisms of Evolution II: genetic drift, recombination, mutations

70. Mechanisms of Evolution I: Natural selection

69. What is a species?

68. Cellular respiration

67. Energy, Membranes, Transport, and Metabolism

66. Cells are the Basic Unit of Life

65. The Chemistry of Life

64. The Ingredients of Life

63. The Gray Areas of Life: Misconceptions and Discoveries

62. Themes in Science: From Emergent Properties to Evolution

61. A Biologists Looks at 50: Reflections from 30 years of doing science

60. The Fermi paradox, aliens, biology, evolution

59. Why we should colonize the solar system

58. The Silurian Hypothesis, evolution, civilizations, aliens, and the legacy of humanity.

57. Life, aliens, opinions, and other things I've been thinking about lately

56. Do the laws of nature make life likely to occur and evolution progressive?

55. What makes an animal different from all other life?

54. Plants have relationships too!