Does the palo santo tree consist of multiple distinct species?

My project tests the hypothesis that the palo santo tree (Bursera graveolens) consists of multiple, distinct...

A study of the radiocarbon ages and isotopic data for a new population of Steller's Sea Cows

Sale of material from marine mammals is generally prohibited. Many bone samples from St. Lawrence Island are...

Do dolphins sleep at depth while swimming?

All animals sleep, but cetaceans engage in unihemispherical sleep, where brainwaves show that only half the...