Vertebrate Evolution: Heads or Tails?
Updated: 2012-01-25 14:49:29
In the aftermath of a mass extinction, nature tends to get creative. Those lucky species that survive often explode with Seussian abandon into a diverse array of shapes, sizes, and behaviors, capitalizing upon the ecological opportunities left available by their less fortunate peers. Usually, the oddities produced by these “adaptive radiations” are whittled down by [...]
In books and movies, time travel is typically fraught with negative consequences. Any attempt to change the past — say, stopping the JFK assassination, or taking your mom to the Enchantment Under the Sea dance — is bound to produce ripples of change that alter the future. But what if you could safely contain a [...]