Groucho's Fact Hunt



Knocker-up of work people isn't that puzzling.

Before clocks or pocket watches were common for the working man to own, factories would often employ a 'knocker-upper' whose job it was to go around the workers houses with a long stick and knock on their bedroom window to make sure they were up on time for their shift.
What happened if the knocker upper slept in? lol
 

Most people know that hummingbirds are the only bird that can fly backwards, but this behaviour can also be witnessed here in the UK.
Dragonflies are able to move each of their four wings independently. They can flap each wing up and down, and rotate their wings forward and back on an axis. Dragonflies can move straight up or down, fly backward, stop and hover, and make hairpin turns—at full speed or in slow motion
65823
 
Most people know that hummingbirds are the only bird that can fly backwards, but this behaviour can also be witnessed here in the UK.
Dragonflies are able to move each of their four wings independently. They can flap each wing up and down, and rotate their wings forward and back on an axis. Dragonflies can move straight up or down, fly backward, stop and hover, and make hairpin turns—at full speed or in slow motion
View attachment 65823
Was a beaut buzzing around my parents garden yesterday afternoon whilst we had a bbq :)
 
Most people know that hummingbirds are the only bird that can fly backwards, but this behaviour can also be witnessed here in the UK.
Dragonflies are able to move each of their four wings independently. They can flap each wing up and down, and rotate their wings forward and back on an axis. Dragonflies can move straight up or down, fly backward, stop and hover, and make hairpin turns—at full speed or in slow motion
View attachment 65823

In the Malaya jungle, they were black and very, very big.
 

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