<p>Black widow cannibalism, a search for space warp hunters and the origin of all language top our favorite stories in Science this week.</p>
<p>Check these out.</p>
Most popular baby names announced
<p> Long may they reign: Jacob and Sophia retained top spots as the most popular boy and girl names in the United States in 2012, according to the Social Security Administration. </p>
<p> Jacob, in particular, appears to have staying power: The name has been No. 1 for boys for 13 years running.</p>
<p>[Full Story: <a href=http://www.livescience.com/29439-2012-most-popular-baby-names.html target="_blank">
It's Official! The Most Popular Baby Names Are ...</a>]</p>
Wanted: Space warp hunters
<p> Astronomers are calling for volunteers to help them search for "space warps," rare and distant galaxies that bend light around them like enormous lenses.</p>
<p> Citizen scientists participating in the Space Warps project, which launches Wednesday (May 8), could help shed light on the mysterious dark matter pervading the universe and aid research into a number of other cosmic phenomena, organizers said.
<p>[Full Story: <a href=http://www.livescience.com/29425-space-warp-galaxies-citizen-science.html target="_blank">Wanted: Citizen Scientists to Hunt 'Space Warp' Galaxies</a>]</p>
Cannibal tadpoles reveal gut secrets
<p> They may look fairly innocuous, perhaps just a little bloated, but Budgett's frogs are aggressive creatures with cannibalistic tendencies from the time they're just tadpoles.</p>
<p> Tadpoles are frogs in their young larval stages, and in most species, they're stuck with simple diets because their digestive tracts cannot process insects or proteins until they mature.
<p>[Full Story: <a href=http://www.livescience.com/29490-cannibal-tadpoles-budgetts-frogs.html target="_blank">
Cannibal Tadpoles Could Reveal Gut Secrets</a>]</p>
Quantum network secretly running
<p> A national laboratory has been running a quantum network that could make perfectly secure Internet communications a reality.</p>
<p> Though the new technology, described May 1 in the preprint journal arXiv.org, is still being run in a test network, the technology could be the first economical and scalable quantum cryptography that could be used with existing fiber-optic networks, specifically on the networks that run electrical grids and other critical infrastructure.</p>
<p>[Full Story: <a href=http://www.livescience.com/29399-quantum-cryptography-network-running.html target="_blank">Quantum Network Secretly Running for 2 Years</a>]</p>
Cosmic rays may spark lightning
<p> All lightning on Earth may have its roots in space, new research suggests.</p>
<p> Lightning flashes on Earth about 100 times per second, but what triggers lightning in thunderstorms remains mostly unknown. Especially odd is the fact that decades of analysis suggest electrical fields within thunderclouds have only a tenth or so of the strength needed to spark a lightning bolt.
<p>[Full Story: <a href=http://www.livescience.com/29387-cosmic-rays-trigger-lightning.html target="_blank">Cosmic Rays Could Spark Earth's Lightning</a>]</p>
When robots will overtake humans
<p> Are you prepared to meet your robot overlords?</p>
<p> The idea of superintelligent machines may sound like the plot of "The Terminator" or "The Matrix," but many experts say the idea isn't far-fetched. Some even think the singularity — the point at which artificial intelligence can match, and then overtake, human smarts — might happen in just 16 years.
<p>[Full Story: <a href=http://www.livescience.com/29379-intelligent-robots-will-overtake-humans.html target="_blank">Intelligent Robots Will Overtake Humans by 2100, Experts Say</a>]</p>
Ancient mother tongue reconstructed
<p> The ancestors of people from across Europe and Asia may have spoken a common language about 15,000 years ago, new research suggests.</p>
<p> Now, researchers have reconstructed words, such as "mother," "to pull" and "man," which would have been spoken by ancient hunter-gatherers, possibly in an area such as the Caucusus. The word list, detailed today (May 6) in the journal Proceedings of the National Academy of Sciences, could help researchers retrace the history of ancient migrations and contacts between prehistoric cultures.
<p>[Full Story: <a href=http://www.livescience.com/29342-ancient-mother-tongue-reconstructed.html target="_blank">Before Babel? Ancient Mother Tongue Reconstructed</a>]</p>
Tongue erections help bats sop up nectar
<p> Bats use erectile tissue to drink. But don't worry — the tissue is on their tongues.</p>
<p> Nectar-eating bats lap up the sweet liquid by engorging their tongues with blood, which, in turn, makes hairlike projections on the tongue stand at attention, new research finds. Together, the erect hairs, called papillae, act like a mop that grabs more liquid than a smooth surface could alone.</p>
<p>[Full Story: <a href=http://www.livescience.com/29346-tongue-erections-nectar-bats.html target="_blank">Tongue Erections Help Bats Sop Up Nectar</a>]</p>
Male black widows eat mates, too
<p> Black widow spiders get their names from the belief that the female devours her partner after sex. But this gruesome ritual doesn't always happen after mating and sometimes, the roles are even reversed, researchers say.</p>
<p> For choosy female black widows, sexual cannibalism is an extreme way to assert their partner preference, with less desirable males more likely to be chased down and eaten after they insert their sperm-coated palps into a female.</p>
<p>[Full Story: <a href=http://www.livescience.com/29345-male-black-widows-sexual-cannibalism.html target="_blank">Male Black Widows Flip Sexual Cannibalism</a>]</p>
Peru pyramid's alignment
<p> An ancient astronomical alignment in southern Peru has been discovered by researchers between a pyramid, two stone lines and the setting sun during the winter solstice. During the solstice, hundreds of years ago, the three would have lined up to frame the pyramid in light.</p>
<p> The two stone lines, called geoglyphs, are located about 1.2 miles (2 kilometers) east-southeast from the pyramid. They run for about 1,640 feet (500 meters), and researchers say the lines were "positioned in such a way as to frame the pyramid as one descended down the valley from the highlands."
<p>[Full Story: <a href=http://www.livescience.com/29335-astronomical-alignment-found-at-peru-pyramid.html target="_blank">Stunning Astronomical Alignment Found at Peru Pyramid</a>]</p>