	Sources	Times
1.	telegraph.co.uk	52
2.	guardian.co.uk	35
3.	news.bbc.co.uk	23
4.	ngm.nationalgeographic.com	23
5.	dailymail.co.uk	18
6.	photography.nationalgeographic.com	16
7.	independent.co.uk	13
8.	newscientist.com	11
9.	youtube.com	11
10.	flickr.com	10
11.	news.discovery.com	9
12.	time.com	9
13.	abcnews.go.com	8
14.	blogs.discovermagazine.com	8
15.	news.nationalgeographic.com	8
16.	discovermagazine.com	7
17.	dsc.discovery.com	7
18.	dailygalaxy.com	6
19.	timesonline.co.uk	6
20.	vimeo.com	6
21.	wired.com	6
22.	popularmechanics.com	5
23.	msnbc.msn.com	4
24.	science.howstuffworks.com	4
25.	scientificamerican.com	4
26.	cosmiclog.msnbc.msn.com	3
27.	airspacemag.com	2
28.	economist.com	2
29.	mailonsunday.co.uk	2
30.	abduzeedo.com	1
31.	blogs.smithsonianmag.com	1
32.	boston.com	1
33.	cdn-www.i-am-bored.com	1
34.	health.howstuffworks.com	1
35.	howstuffworks.com	1
36.	i.dailymail.co.uk	1
37.	io9.com	1
38.	kontraband.co.uk	1
39.	livescience.com	1
40.	metacafe.com	1
41.	miamiherald.com	1
42.	news.yahoo.com	1
43.	nytimes.com	1
44.	physorg.com	1
45.	sciam.com	1
46.	silicon.com	1
47.	smithsonianmag.com	1
48.	toxel.com	1