Not Your Father’s Evolution
(Feb. 2, 2012) A few bullet points can sum up the major steps in the history of life on Earth, à la PowerPoint:
(First slide) Genetic Evolution:
• 4.5 billion years ago, Earth coalesced out of dust and gas surrounding the sun.
• 3.8 billion years ago, life arose, in the form of simple replicators.
• 1.5 billon years ago, single-celled organisms with nuclei (eukaryotes) were synthesized from simpler cells which lacked nuclei (prokaryotes); followed half a billion years later by multi-cellular organisms.
• 500 million years ago, early plants and animals emerged from the “Cambrian Explosion.”
• 7 million years ago, our “hominid” lineage split off from that of chimpanzees.
(Second slide) Cultural Evolution:
→ post a comment
Recent field notes
Jan. 26
North Rules
Jan. 19
Symbiosis: Evolved Evolution
Jan. 12
Curiosity en Route
Today
Sequoia Park Zoo Conservation Lecture Series
events, lecture, meetings, science, free / 7-8 p.m. Sequoia Park Zoo, 3414 W St., Eureka. The next in Sequoia Park Zoo’s Conservation Lecture Series is a fascinating introduction to the fight to save the iconic California condor from extinction. www.sequoiaparkzoo.net. 441-4263.
Eureka Mindfulness Group
wellness / 7:15 p.m. First Christian Church Eureka, 730 K St. Led by Cindee Grace. Topic: "Facing Uncertainty" Free-will donation. Fragrance free, please. 269-7044.
Ba-Dum-Chh Comedy Night
Comedy / 8:30 p.m. Cher-ae Heights Casino, Trinidad. Local blue comedy troupe makes with the funny. If you get offended, don't go! cheraeheightscasino.com. 800-684-2464.
Petunia and the Vipers (hillbilly swing)
music / 9 p.m. Riverwood Inn, 2828 Avenue of the Giants, Phillipsville.
More →
0 Comments