There are many exoplanets that have been discovered during the last 12 years. See the sources and related links below for Wikipedia's article on exoplanetary systems. Most were found this millennium.
in the 21st century
Because 21st century is the times related to systems biological times.
The eclipse of July 22, 2009 will be the longest eclipse this century.
There is an online store that specializes in camping lanterns that carries solar lanterns. You can find it at http://www.campinglanterns.net/solarlantern.aspx. 21st Century Goods (http://www.21st-century-goods.com/category/Solar_Flashlights_and_Lanterns.html), Amazon.com and Overstock.com also carry some solar lanterns and flashlights.
21st century.
We are in the 21st Century.
It is in the 21st century.
the 21st century
~this is the 21st century
Oil, coal, gas, wind, tides, solar, nuclear are the main ones.
Yes they do have batteries in the 21st century and had in the 20th century.
No, there is no apostrophe in the phrase "21st century."