Atomic mass, symbol and atomic number Thallium is a naturally occurring element with the elemental symbol Tl and the atomic number 81. In the periodic table it stands with an atomic mass of 204.38 u in the 3rd main group. The chemical element discovered by William Crookes in 1861 is not radioactive and is in a solid state at room temperature.

While many habitats have plants, fruits, nuts and berries available for consumption by humans walking by, most places (if any?) seem to require significantly more effort than simply picking our foo…

Some bioengineering is investigated in high carbon dioxide environments. Are there any microbes like bacteria or Archaea capable of living and multiplying in such environments?

My textbook says that regeneration isn't possible in complex multicellular organisms. But why? Why can't specialized cells be present in the bodies of complex multi cellular organisms which can

Microorganisms (or microbes, as they are also called) are small organisms. Most microorganisms are harmless to humans and, in fact, many are helpful. They play fundamental roles in ecosystems everywhere on earth, forming the backbone of many food webs. People use them to make biofuels, medicines, and even foods.

I admit I'm not very learned on the subject of evolution, I just started researching it for myself about a week ago. One of the things that I don't understand is why humans and almost every other a…