On a dry lakebed in Death Valley, rocks weighing up to 320 kilograms locomote themselves slightly uphill over time, often leaving zig-zag trails in their wakes. Geologist Paula Messina has painstakingly documented boulder movement via GPS. Smells like a hoax? Take a look at this table, linked to hard data on every named rock. A time-lapse map records boulder movement over time — some have chugged as far as 3.2 kilometers.
The mechanisms for these unusual events have been hypothesized and in some cases tested, but never proven.

You know Spring has arrived with vigour when ivy crawling the outside of the house becomes overzealous and finds it way into your office. Don’t tell our landlord. This wouldn’t have happened if we had prevented the ivy from becoming enmeshed in the shingles to begin with. But we’re suckers for inflourescence. Amy found the creeper and truncated it outside the house. Life support pulled out from under it, the indoor tendril collapsed a few hours later.