Christmas Cards

Our festive cards are folded to A6 and come in packs of 10, including envelopes. The cards are blank inside, and have some information about the design and the BHA on the reverse.

2015 10 27 v1 AW A6 Greetings Cards Festive DNA For Shop

For centuries, light and colour have been a treasured part of midwinter celebrations. If you want to add a twist, literally, it’s easy to put two strings together to form a DNA-esque double helix.

We think it’s a fitting reminder that no matter when, where or what you celebrate, we’re all the same underneath.

Price: £8.00
2015 10 27 v1 AW A6 Greetings Card Analemma for shop

If you were to note the position of the sun at the same time every day over the course of a year, you’d end up with the distinctive figure-eight pattern shown on this card – known today as an analemma.

For thousands of years the analemma frustrated attempts to tell the time: sundials would cheerfully go out of sync with hourglasses or burning candles. The difference was a challenge to anyone putting together a theory of astronomy, and inspired much scientific inquiry.

Today we know the peculiar shape of the analemma is caused by the tilt of the Earth on its axis, and our orbit being elliptical rather than circular. And it rotates: if you’re at the poles, it’s vertical; if you’re at the equator, it’s horizontal.

At the winter solstice (in the northern hemisphere), the sun is at the lower tip. We think the analemma is a lovely symbol to mark the passing of the year and the progress of humanity.

Price: £8.00
2014 Card: Tree of Life

Our 2014 card is a festive representation of Charles Darwin’s Tree of Life – his first sketch of the idea that all species are related, and evolved from a common ancestor.

The tips of the branches represent species that are alive today, and as you travel from the star to his hat you pass every species that has ever existed (plus the Galápagos Finch, which played an important role in the inception of Darwin’s theory of evolution by natural selection.)

Price: £8.00




This card comes with a twist: if you turn it upside-down, it celebrates a different midwinter festival. Click here to see the upside-down image.

There’s some text on the back that hints at this, though doesn’t give it away explicitly.

Price: £8.00

Darwin getting into the festive spirit.

Price: £8.00


Pine cones naturally grow in Fibonacci spirals – a form of the ‘golden ratio’ that pervades nature, mathematics and art. We think they’re an appropriately festive and fascinating symbol to help celebrate the holiday season and the turning of the year.

Price: £8.00


A festive take on our atheist bus logo.

Price: £8.00

Found in snowflakes and frost crystals formed naturally on cold glass, fractals also appear in the reflections of baubles.

Price: £8.00