Two climate activists have hurled soup at the glass protecting the Mona Lisa at the Louvre Museum in Paris and shouted slogans advocating for a sustainable food system.

The “Mona Lisa” has given up a secret.

Good pictures can be expensive. However, one Florida student found out discounts can be even more costly.

Perhaps the reason why the Mona Lisa maintains her famously enigmatic smile is that she benefits from one of Paris’ best-kept secrets: An underground cooling system that’s been helping her cope with sweltering heat that has broken temperature records in Europe.

A man seemingly disguised as an old woman in a wheelchair threw a piece of cake at the glass protecting the Mona Lisa at the Louvre Museum and shouted at people to “Think of the Earth.”.

Leonardo da Vinci's Mona Lisa hangs on the wall in a deserted Louvre museum, in Paris, Thursday, Feb. 11, 2021. The 518-year-old Mona Lisa will have seen many things in her life on display, but rarely this: Almost four months with no visitors. She stares out in Paris' Louvre, across bulletproof glass into the now-silent emptiness of the shuttered Salle des Etats. (AP Photo/Thibault Camus)PARIS – The 518-year-old Mona Lisa has seen many things in her life on a wall, but rarely this: Almost four months with no Louvre visitors. It’s uncertain when the Paris museum will reopen, after being closed on Oct. 30 in line with the French government’s virus containment measures.

Visitors take photos of the Leonardo da Vinci's painting Mona Lisa, in Paris, Monday, July 6, 2020. The home of the world's most famous portrait, the Louvre Museum in Paris, reopened Monday after a four-month coronavirus lockdown. Paris' Louvre Museum, which houses the world's most famous portrait, reopened Monday after a four-month coronavirus lockdown and without its usual huge throngs. The bulk of the Louvre's visitors before the pandemic used to come from overseas, led by travelers from the United States. The Louvre is hoping to instead attract visitors from closer to home, including the Paris region, but is bracing for a plunge in numbers.

Journalists walk past Leonardo da Vinci's Mona Lisa during a visit of the Louvre museum ahead of its reopening next July 6, in Paris, Tuesday, June 23, 2020. After four months of virus-imposed inactivity, the world's most visited museum is counting on the worlds most famous portrait, the Mona Lisa to help lure back visitors, when the Louvre reopens on July 6. (AP Photo/Christophe Ena)PARIS The Mona Lisa found herself all alone. The coronavirus had emptied her room at the Louvre Museum of its usual throngs of admirers. Signs remind dawdlers that "Mona Lisa has a great many admirers.