Rescuers are still combing through the rubble Tuesday morning in Moore, a suburb of Oklahoma City. More is the hometown of Republican Rep. Tom Cole. He encourages everyone to remember that people in the area will need long-term help.

Scientists in Canada were working at an experimental research farm, testing crops like corn and barley. But packs of Canadian geese had been swooping in and destroying the crops. Two border collies were hired to chase away the geese.

The late Indian leader Mohandis Gandhi, who became known as Mahatma, or venerated one, had an appendectomy decades ago. Afterward, doctors took samples of his blood. Two microscope slides bearing that blood are being auctioned in London.

The daily lowdown on books, publishing, and the occasional author behaving badly.

Both the former IRS commissioner who was in charge when the agency singled out some conservative groups for extra scrutiny and the man who replaced him will be appearing at a Senate Finance Committee hearing Tuesday morning.

Douglas Shulman, an appointee of President George W. Bush who left the IRS last November, and acting commissioner Steven Miller (who is losing his job because of the scandal) are due at the 10 a.m. ET hearing.

(We're following the news from Oklahoma, where a tornado devastated the Oklahoma City suburb of Moore on Monday. Most recent update: 8:30 a.m. ET.)

The official death toll from the monster tornado that roared through Moore, Okla., on Monday stands at 51.

But Amy Elliott, a spokeswoman for the Oklahoma state medical examiner's office, has warned that officials fear at least another 40 people were killed. Some of those are thought to be children in one of the schools that was destroyed by the powerful storm.

IRS and Treasury officials can expect a hard time in their appearances on Capitol Hill Tuesday. A key question that so far has not gotten much attention: How did it come to be that social welfare organizations became vehicles for political activity?

In Italy, the youth jobless rate is nudging 40 percent, a record high in post-war history. Demographer Stefano Rosina says the Italian welfare system has always been skewed toward the middle-aged and elderly, leaving Italian youths with no political or trade union representation.

When news of Yahoo's purchase of Tumblr first hit, Tumblr users took their reactions online. The posts were quirky and sharp with plenty of worry about the future.

There is word of another controversial leak investigation by the Department of Justice. The target is Fox News reporter James Rosen, who was monitored by the department after breaking a story about North Korea's nuclear weapons program in 2009.