An e-news­let­ter with some of the world’s most ex­cit­ing sci­ence news and pho­tos, of­ten months be­fore they ap­pear in other mag­a­zines and news­pap­ers. The World Sci­ence news­let­ter is free and comes out ap­prox­i­mately ev­ery 3-10 days. All are in­vi­ted to join. If you don’t have Ya­hoo email, you can still eas­ily sign up. Just (1) send a blank e­mail here, (2) wait a few mi­n­utes for the sys­tem to send you a con­fir­ma­tion e­mail, (3) click 'reply' to that and send it.