BeautifulSoup

import requests
from bs4 import BeautifulSoup


r = requests.get("http://www.sciencemag.org/content/current")

soup = BeautifulSoup(r.content)
data = soup.findAll("div", {"class":"level2"})

#Find the "research article" and get it's index.
for block in data:
	if block.find("h3", {"id":"ResearchArticles"}) is not None:
		index = data.index(block)
		break
#set data to equal everything after the research article block.
data = data[index:]

#loop through the blocks and get the titles. 
for block in data:
	section = block.find("ul",{"class":"cit-list"})
	titles_list = section.findAll("h4",{"class":"cit-title-group"})
	for title in titles_list:
		print title.text.encode("utf-8")