Welcome to Sunday. The top five stories on our website this week are displayed below.

Good reads you may have missed: This first week in May brings with it a few welcome spring celebrations. You may mark May Day with dancing and Cinco de Mayo with a festive cocktail – but how well would you do on a “Jeopardy” category about either holiday?

In separate stories, two scholars from USC Dornsife College of Letters, Arts and Sciences explain the history and meaning of these holidays many Americans misunderstand. Anthropologist Kirby Farah covers the history of Cinco de Mayo, while her colleague Peter C. Mancall tells us why Puritans condemned their fellow colonialists for frolicking around a tree decorated with ribbons.

Emily Costello

Managing Editor

April’s super full moon was known as the pink moon because it heralds the arrival of spring flowers. Mark Rightmire/MediaNews Group/Orange County Register via Getty Images

This supermoon has a twist – expect flooding, but a lunar cycle is masking effects of sea level rise

Brian McNoldy, University of Miami

Sea level is still rising, and when that lunar cycle starts upward again, it will mean double trouble for places like Miami.

Faster than light travel is the only way humans could ever get to other stars in a reasonable amount of time. Les Bossinas/NASA/Wikimedia Commons

Warp drives: Physicists give chances of faster-than-light space travel a boost

Mario Borunda, Oklahoma State University

If humanity wants to travel between stars, people are going to need to travel faster than light. New research suggests that it might be possible to build warp drives and beat the galactic speed limit.