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

Editor’s pick: Brood X cicadas are big and loud — but at least they don’t bite. That’s not the case with ticks, another unpopular bug having a field day in the eastern United States this summer. In an article we published in May of last year, epidemiologist Durland Fish, who spent decades researching infectious diseases, explains the connection between deer, tick bites and Lyme disease — and why more of the country needs to do tick checks this summer.

Emily Costello

Managing Editor

It can stretch your mind to ponder what’s really out there. Stijn Dijkstra/EyeEm via Getty Images

Does outer space end – or go on forever?

Jack Singal, University of Richmond

Astronomers know a lot about what's in outer space – and think it's possible it never ends.

New research suggests that Venus’ crust is broken into large blocks – the dark reddish–purple areas – that are surrounded by belts of tectonic structures shown in lighter yellow–red. Paul K. Byrne/NASA/USGS

The surface of Venus is cracked and moves like ice floating on the ocean – likely due to tectonic activity

Paul K. Byrne, North Carolina State University

Researchers used decades-old radar data and found that some low-lying areas of Venus' crust are moving and jostling. This evidence is some of the strongest yet of tectonic activity on Venus.